Proto Balance Mail – SMTP/POP Load Balancer Mail User Manual
Contents
1. a ee gee eB mee a Seng ee a sN Your LAN l l l l l Your Your Your Your email email email email server server server server adam org us henry org us mary org us roger org us through through through through harry org us marge org us rob org us zach org us Nba e e o a cc ee u eis ee M i 4 First time Configuration To configure Proto Balance Mail for incoming email takes only a few minutes After installing and invoking Proto Balance Mail you should be able to login to the configuration web page See the main user manual for more information on installation and startup Note that on Unix Proto Balance Mail requires more semaphores than other Proto Balance Products You need to start Proto Balance Mail with traffic logging enabled Make a new folder directory C maillog Windows or var log maillog Unix use the command line option monthly C maillog or monthly var log maillog 4 1 Step 1 Create an SMTP cluster Proto Balance Mail needs to listen on port 25 for incoming mail delivery attempts Therefore your first action should be to click on the Add SMTP Cluster tab which adds a listener for port 25 In the form only the fields with a yellow background are mandatory You can leave all other fields at their default values The field SMTP host name is the official name of the mail server used in status messages on the wire This should be a fully qualified DNS resolvabl2. For instance if someone sends email to the address accounts org us then both brad org us and janet org us should receive it This might be for reasons of processes within your organization Configuring alias addresses can be done by going to the Email Database tab filling in a new alias expansion and clicking on the Add Alias button The Alias list can be a comma separated list The Alias list should be short I e you should not try implement a large mailing list using this feature Instead use dedicate mailing list software if you have this requirement If you need to bulk add aliases say from your previous mail handling software first read the section Bulk Importing of Thousands of Email accounts above Be sure to Vacuum and Re read your database as required Copyright 2003 2010 Shine The Way 238 CC All rights reserved 10 PROTO BALANCE MAIL USER MANUAL 14 LOG FILES The flat database file used for alias information is alias csv under the directory specified by the directory command line setting The file has a two column format such as accounts org us brad org us janet org us abuse example com admin example com info org us john org us peter gmail com everyone org us info org us accounts org us Use the ASCII character 9 decimal to separate the two columns Aside from newline characters at the end of each row there should be no other white space characters in the file Note that you can f
3. SPAM and virus filters on all your mail servers Proto Balance Mail varies the grey listing algorithm slightly Grey listing defines an initial period during which an email is blocked This period defaults to Greylisting initial time under the Info tab which is usually set to 5 minutes Should the email appear suspicious however this initial period may be automati cally increased to as much as Greylisting initial time for suspicious email under the Info tab which is usually set to 2 hours The precise algorithm by which email is judged to to suspicious cannot be disclosed for obvious reasons IP addresses over a certain threshold of suspicious are blacklisted outright If the remote mail server performs a delivery before after the initial period and before Greylisting first window usually 6 hours the email will be permitted and become a permanent record After 6 hours the record will expire and the algorithm will start again Permanent records are kept for Greylisting max record age usually 120 days Copyright 2003 2010 Shine The Way 238 CC All rights reserved 16 PROTO BALANCE MAIL USER MANUAL 19 XML COMMAND REFERENCE 17 Spam Blocking Effectiveness The preceding techniques resulted in SPAM being reduced by a factor of 50 on one of our customers sites However the effectiveness of the technique depends on the scale of your email cluster A 98 reduction was achieved on a system of 20 000 active mail b
4. and scroll down to the Add Email form Within this form you can add a new user account Next to Email address you need to put the full email address of the user account As an example let us say that this user is henry org us Next to Box Name you need to insert the unique identifier of the previous step This will mean that incoming mail for this user will be delivered to that mail server The Password field is for POP authentication and outgoing email This should be set to the same as the password for the same user account on your mail server Outgoing mail and POP will be discussed later After you have added the email account you can click on Search Email to view or modify the account 4 4 Step 4 Testing mail delivery You can now test email delivery by switching your MX record for org us to Proto Balance Mail and then attempting to send an email to henry org us Alternatively you can use telnet to connect to port 25 of Proto Balance Mail as follows 220 smtp org us ESMTP HELO 250 ok MAIL FROM lt admin org us gt 250 ok RCPT TO lt henry org us gt 250 ok DATA 354 Start mail input end with lt CRLF gt lt CRLF gt Subject test Copyright 2003 2010 Shine The Way 238 CC All rights reserved 6 PROTO BALANCE MAIL USER MANUAL 5 BULK IMPORTING OF THOUSANDS OF EMAIL ACCOUNTS test 250 MAIL1 250_0k_1262775853_qp_13377__ quit 221 bye Under mylogs your log file will then contain a l
5. of all email addresses as well as all aliases Follow the instructions in the Mail User Manual You will need to randomly assign a box to each email record so that one third of the deliveries direct to each mail server Now deploy Proto Balance Mail and create a cluster with boxes pointing to each of your mail servers Setup each box to be a fall over to its neighboring box Foreign SMTP delivery Proto Balance Mail MX record You can now test that mail delivery works either by setting up a dummy delivery from a foreign SMTP server tricked to thinking your MX record is that of Proto Balance Mail or you can telnet Copyright 2003 2010 Shine The Way 238 CC All rights reserved 24 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS to Proto Balance Mail and issue a mail session manually see the Mail User Manual for how to do this Note that grey listing will block first deliveries you need to wait until the grey listing first interval has expired and try again Alternatively you can turn off grey listing by setting Default spam filtering to Disabled in the cluster configuration Finally you can switch over your MX records Foreign SMTP delivery MX record Proto Balance Mail User POP Note that it is not ideal to use Proto Balance Mail for incoming spam filtering without also doing outgoing deliveries through Proto Balance Mail This is because outgoing deliveries create white list record
6. recommended that except for Proto Balance Mail itself you completely block port 25 access to your back end mail servers This means that all email passes through Proto Balance Mail only As a security precaution one ISP did in fact block all port 25 traffic from it s DSL clients This was done in order to protect it s dynamic address ranges from being black listed due to Mail bots The only allowed port 25 traffic was through Proto Balance Mail Copyright 2003 2010 Shine The Way 238 CC All rights reserved 9 PROTO BALANCE MAIL USER MANUAL 10 ALIAS ADDRESSES 9 Multiple Proto Balance Mail Machines To have complete fall over safety with no single point of failure you can deploy multiple Proto Balance Mail machines that manage the same cluster of back end mail servers This means that you can have an MX record for each If you install more than one Proto Balance Mail machine on the same LAN the same segment of your network then Proto Balance Mail will automatically find other instances using broadcast discovery packets Such discovered machines are called sisters and are visible under the Info tab next to the Sisters row of the top info box Proto Balance Mail will keep the databases of all sister machines synchronized Specifically the following data sets are kept replicated to and from all sister machines 1 Email account database 2 Email alias database 3 Greylist records 4 Whitelist records 5 IP access rec
7. user account database Further XML examples for example to modify the cluster and box configuration are available on request Change a user s password lt xml version 1 0 encoding UTF 8 gt lt commitmodifyemail gt lt accesskey gt qwerty lt accesskey gt Copyright 2003 2010 Shine The Way 238 CC All rights reserved 17 PROTO BALANCE MAIL USER MANUAL 19 XML COMMAND REFERENCE lt email_address gt abigail example com lt email_address gt lt user_password gt Qrlhax7IMF lt user_password gt lt commitmodifyemail gt Change a user s backend mail server lt xml version 1 0 encoding UTF 8 gt lt commitmodifyemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt boxid gt MAILSERVER002 lt boxid gt lt commitmodifyemail gt Change a user s complete configuration lt xml version 1 0 encoding UTF 8 gt lt commitmodifyemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt user_password gt Qrlhax7IMF lt user_password gt lt boxid gt MAILSERVER001 lt boxid gt lt to_equals_from gt 1 lt to_equals_from gt lt null_reverse_path gt 1 lt null_reverse_path gt lt spam_setting gt 1 lt spam_setting gt lt rcpt_per_mail gt 50 lt rcpt_per_mail gt lt auto_reply_subject gt lt auto_reply_subject gt lt auto_reply_body gt lt auto_reply_body gt lt auto_repl
8. Proto Balance Mail SMTP POP Load Balancer http www protonet co za Mail User Manual Copyright 2003 2010 Shine The Way 238 CC All rights reserved Proto Balance Mail User Manual March 28 2010 Contents t eIntroduction iccedieoese Podiegie ieee PEN ree ee ea eee ee PON ER ees 1 1 Overview 3 1 2 Installation and start up 3 2 How Proto Balance Mail Works cc cece cece cece ec cere cee eee eee eee eeees 3 More About How Proto Balance Mail Works cece cc ccc cee ee ee eens 4 First time Configuration sesi orrore t Sea eek Seta ee ee See ee ie tte Se ed ee ee ek Coe ee 4 1 Step 1 Create an SMTP cluster 5 4 2 Step 2 Add a back end mail server 6 4 3 Step 3 Adding an email account 6 4 4 Step 4 Testing mail delivery 6 5 Bulk Importing of Thousands of Email accounts cece cece cece eee ee eens 6 Valid Email Addresses sowo raissit tno inaa le EEEE ho a ANo a bo ia enna el arg Cone cece are ane Te Configuring POP wacsccadwa ee leach be ate E eee ba dea E bu ee a dae ds bGadle tes ees 7 1 Step 1 Create an POP3 cluster 8 7 2 Step 2 Add a back end mail server 8 7 3 Step 3 Configure your email client 8 8 Configuring Outgoing SMTP ssassn ccs hele a bien sin bese te FS Bie ole ais Wien ale Beis a eee a 9 Multiple Proto Balance Mail Machines cece ce cece eee eee cere ee eeee 10 Alias AGdresses 5 25 ss naaa a dia is Nese sca a aU d
9. S Begin by deploying Proto Balance Mail and moving a single trial user Copyright 2003 2010 Shine The Way 238 CC All rights reserved 21 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS Foreign SMTP deliver Email server MX record User POP SMTP Proto Balance Mail Next gradually migrate all your users as follows Foreign SMTP deliver Email server MX record User POP SMTP Proto Balance Mail Finally migrate your MX record of your DNS Domain Name Server Foreign SMTP delivery oS x Proto Balance Mail Copyright 2003 2010 Shine The Way 238 CC All rights reserved 22 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS Your system will now work as before but with Proto Balance Mail s advanced Spam filtering system Now you can scale your new system apportion your mailboxes divide users into groups as you please Foreign SMTP deliver Email i server MX record User POP SMTP Proto Balance Mail o Why is this better than any other system Because no other clustering solution allows you to apportion mailboxes to separate machines With Proto Balance Mail you can for example put your sales department on one mail server and your engineering department on another mail server even if those departments have the identical domain part of the email address e g mycorp com Without Proto Balance Mai
10. alias gt Unblock a user and or IP address lt xml version 1 0 encoding UTF 8 gt lt setblockip gt lt accesskey gt qwerty lt accesskey gt lt block_email gt 0 lt block_email gt lt email_address gt abigail example com lt email_address gt lt address gt 1 2 3 4 lt address gt lt setblockip gt Retrieve a list of blocked IPs This is a list of IP addresses of your own users who have been blocked due to mailware viruses sending mail through Proto Balance lt xml version 1 0 encoding UTF 8 gt lt blockedips gt lt accesskey gt qwerty lt accesskey gt lt blockedips gt Delete an email address lt xml version 1 0 encoding UTF 8 gt lt deleteemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt deleteemail gt Delete an alias address lt xml version 1 0 encoding UTF 8 gt lt deletealias gt lt accesskey gt qwerty lt accesskey gt lt email_address gt sales example com lt email_address gt lt deletealias gt Add a new email address lt xml version 1 0 encoding UTF 8 gt lt addnewemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt user_password gt Qrlhax7IMF lt user_password gt lt boxid gt MAILSERVER001 lt boxid gt lt to_equals_from gt 1 lt to_equals_from gt lt null_reverse_path gt 1 lt null_reverse_path gt lt spam_set
11. am setting of Default Proto Balance Mail currently only supports Greylisting or None Note that Proto Balance Mail s greylisting a more advanced form generic greylisting which includes statistical analysis Sleep on certain SMTP errors If a remote SMTP delivery behaves in a suspicious or erroneous fashion Proto Balance Mail will artificially hold the connection open to appear to be busy for this number of seconds in order to frustrate the offending peer You should set this value to reasonable random value of your choice Client relay address ranges If your client desktop machines do not have passwords configured for their outgoing SMTP delivery then you can authenticate them using their IP addresses If you are an ISP these will be the DSL address ranges that you dynamically serve If you are a company or college then these will be the local IP address ranges used on your campus Foreign SMTP server SPAM whitelist These are address ranges of remote SMTP servers that should not ever be automatically blacklisted by Proto Balance Mail s auto blacklisting mechanism For safety you should include here the address ranges of the SMTP servers of the top providers of email services like google hotmail yahoo etc Recipients per MAIL FROM Desktop mail bots will typically try to send a large number of emails using different sender addresses Regular users normally use only a small number of personal email addresses Proto Balance Mail c
12. d domain name FQDN of the mail server This means that you must put the full name of your mail server in this field For instance use smtp example com and not just smtp The name must also be resolvable to an IP address using DNS This means that the command nslookup smtp example com must work and must display the valid IP address of the machine on which Proto Balance Mail is running Reverse DNS should also resolve back to the FQDN Contact the administrators of your DNS server to get more information For initial evaluation of Proto Balance Mail it is not immediately necessary to change your DNS configuration Listen interface address Ethernet IP on which to accept new TCP connections for email delivery This will usually be 0 0 0 0 indicating to listen on any available interfaces Occasionally however if you have more than one network interface you may choose to put the specific interface IP address here this would be for security firewalling purposes TCP listen port The port on which to accept new connections This is almost always port 25 Comment You can put arbitrary informational text here How to choose relay box When a user of your email system attempts a remote delivery there are two ways Proto Balance Mail can choose which box through which to relay that delivery This can either be a random choice the setting Load balance over SMTP relay enabled boxes or a choice based on the mail server configured for this user accou
13. d quota under the Info tab then the user is blocked from further delivering email and appears in the blocked list under Show blocked IP addresses This will have the effect that spam bots running on your user s infected machines will not be able to send large amounts of email thus preventing your mail servers from getting blacklisted Auto reply subject If a user wishes to enabled out of office auto replies then this setting can be configured This setting accepts a Unicode UTF 8 string Leave blank to disable auto replies Copyright 2003 2010 Shine The Way 238 CC All rights reserved 15 PROTO BALANCE MAIL USER MANUAL 16 SPAM PREVENTION Auto reply message body See previous setting This setting accepts a Unicode UTF 8 string Leave blank to disable auto replies Auto replies are send with Content Type set to text plain charset UTF 8 This means that auto replies are fully internationalized Auto reply keep copy If set to Enabled this setting causes email to continue to be delivered to the user s mailbox while also sending an auto reply Auto reply expiry date The date and time up until which the auto reply will be active Unlimited email If set to Enabled this will allow the user to send an unlimited amount of email See next setting Unlimited email expiry date This will set a date limit after which the unlimited email setting will be disabled The settings Unlimited email and Unlimited email exp
14. dware and network infrastructure Other mail solutions work with expensive SAN arrays and clustered file systems whereas Proto Balance Mail can provide better performance with entry level commod ity hardware at a fraction of the cost Proto Balance Mail is protected by patents filed in the U S A and the European Union 1 2 Installation and start up To install Proto Balance Mail download an installer for your operating system from the Free Trial tab On Windows you can run the installer directly On Unix systems including MacOS X you should give the installer executable permissions and install it as root Type the following command at the command prompt chmod a x install bin install bin Then follow the instructions To start up Proto Balance Mail simply type protobalance You can now point your web browser to http 127 0 0 1 8080 to view Proto Balance Mail s config uration and diagnostic interface See the generic user manual for Proto Balance to get information on running Proto Balance Mail with various settings for high performance 2 How Proto Balance Mail Works Proto Balance Mail distributes email load over a number of servers such that the email of a particular user is always delivered to and can always be retrieved POPped from the same server This means if you host a total of 100 000 mail accounts at your organization you can host 10 000 mail accounts on each of 10 servers and Proto Balance Mail will ensure tha
15. e host name Unique Identifier can be anything Copyright 2003 2010 Shine The Way 238 CC All rights reserved 5 4 2 Step 2 Add a back end mail server 4 FIRST TIME CONFIGURATION It is important that Proto Balance Mail does not attempt to deliver mail messages larger than your existing email servers can accept therefore you must set Max mail size in kilobytes to be smaller than the maximum email message size allowed by your mail server For testing purposes you should turn spam filtering off Set Default spam filtering to Disabled 4 2 Step 2 Add a back end mail server You now need to add at least one back end mail server that will accept email deliveries This mail server needs to be configured with user accounts and mail boxes and be ready to accept email deliveries If you have an existing mail server then this should work fine Click on Clusters and then on Add box Fill in the IP address of your email server next to TCP connect address Fill in the listening port of your email server next to TCP connect port this will usually be port 25 The field Unique Identifier is important This will be a text string used to identify the box to which an email is sent for a particular recipient You should choose something short and descriptive This will be discussed in the next step After adding the box click on the green traffic light to enable it 4 3 Step 3 Adding an email account Click on Email Database
16. ecord for mydomain com will be the machine on which you have installed Proto Balance Mail Google s email server will connect to Proto Balance Mail and begin an email session to transmit the email Proto Balance Mail will see that you have previously configured an email account headmaster mydomain com The email account will have a back end email server machine associated to it The back end mail server can be Microsoft Exchange PostFix Sendmail QMail or any other mail server software you have previously installed Proto Balance Mail will transparently forward the email session to your back end mail server Your back end mail server will append the email to your mailbox At your PC or Mac you will then try to retrieve your new email aka your Inbox Your email client will have a user name and password configured to retrieving email using say POP3 Your email client will have configured for incoming email the server where Proto Balance Mail is running and will connect to this server Proto Balance Mail will authenticate you and transparently direct your email retrieval session to the same back end email server where your mail box is stored Your email client will display the email to you You may have thousands or millions of email accounts but each email server need only host a portion of them The email servers need not know about each other they only need to know about the email accounts they alone are responsible for In this way yo
17. ee Multiple Proto Balance Mail Machines in the Mail User Manual Foreign SMTP a delive Email server ty cluster MX record MX record MX record Proto Balance Mail Triply replicated machines o How do Proto Balance Mail instances discover each other Proto Balance Mail broadcasts UDP packets on port 7931 and 7932 using a discovery and replication protocol Proto Balance Mail machines will automatically negotiate sessions with all other machines on the local LAN as well as all machines explicitly configured as sister hosts Protocol packets are crypto signed for security o How many Proto Balance Mail machines can I have replicating between one another Proto Balance Mail replicates all data to all discovered sister machines The replication protocol is a binary encoded protocol of very small packets and is therefore light weight and fast However network load will increase quadratically with the number of Proto Balance Machines Therefore we recommended proceeding cautiously over 20 machines Note that this has nothing to do with the number of back end mail servers which is unlimited Copyright 2003 2010 Shine The Way 238 CC All rights reserved 20 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS o If I have a University College with different faculties can I put each faculty on a different mail server even if all email addresses have the same domain part of the email address Yes Y
18. gt An example python script to do this is import socket string from myconfig import balance_address 192 168 0 1 def xmlsubmit xml c socket socket c connect balance_address 8080 c send POST xml HTTP 1 0 r n c send content length s r n len xml c send r n s xml wn r while 1 v c recv 4096 if not v break r r v return r red_yellow lt xml version 1 0 encoding UTF 8 gt lt yellow gt lt accesskey gt qwerty12345 lt accesskey gt lt clusterid gt Cluster001 lt clusterid gt lt boxid gt BOX001 lt boxid gt lt yellow gt print xmlsubmit red_yellow How you establish the length of your mail queue depends on the SMTP software you have available Copyright 2003 2010 Shine The Way 238 CC All rights reserved 26 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS o Will Proto Balance Mail handle email alias addresses Yes With Proto Balance Mail you can configure aliases to different users even foreign email addresses and across different mail servers Proto Balance Mail will transparently copy all emails in the alias expansion Copyright 2003 2010 Shine The Way 238 CC All rights reserved 27
19. hat user replies the reply will not be greylisted or otherwise delayed This setting dictates how long to keep such records Spreadlist max record age This is an internal setting for use with Proto Balance Mail s pro prietary spam analysis engine Please consult us before adjusting this setting The following settings relate to limits imposed on relay clients meaning desktop machines or other systems that are allowed to use your Proto Balance Mail installation s outgoing delivery service Such are identified either by being within Client relay address ranges or because they are authenticated using SMTP AUTH Recipient exceeded quota The number of times a client can receive the error number of recipients exceeded before being blocked and listed under Show blocked IP addresses Interval The interval of the previous setting after which the internal count is reset Spam bots tend to send a lot of email in a short period Use an interval of between 1 and 10 minutes Copyright 2003 2010 Shine The Way 238 CC All rights reserved 14 15 3 Email and alias settings 15 SETTINGS REFERENCE MAIL FROM total quota The number of MAIL FROM commands a client can send before being blocked and listed under Show blocked IP addresses Interval The interval of the previous setting after which the internal count is reset Spam bots tend to send a lot of email in a short period Use an interval of between 1 and 10 minutes Distinct FROM e
20. hat Proto Balance Mail successfully authenticated the user henry org us using the password previously entered into the email database It also means that Proto Balance Mail was able to connect to the back end mail server and login using henry org us and the same password jdfu2bnc Note that the password in the email database must exactly match the password of the same email account known to your mail server Proto Balance Mail supports the POP3 authentication mechanisms of APOP LOGIN and USER However Proto Balance Mail will itself connect to the back end mail server using USER authentication Hence your back end mail server must support USER authentication To very that it does issue the same telnet session above directly to your back end mail server 8 Configuring Outgoing SMTP Outgoing SMTP configuration is not critical to the handling of mail because it does not involve a mailbox However the correct configuration of outgoing SMTP has certain advantages 1 Whitelists between senders and recipients are created such that reply emails do not incur delays In other words if henry org us sends email through Proto Balance Mail to mary gmail com then Proto Balance Mail will record the association between these two persons in its internal database Thereafter mary gmail com can send email to henry org us and be sure that her email will never be flagged as SPAM it will be delivered immediately 2 Proto Balance Mail can be conf
21. hat the same sender will tend to send through the same box unless that box is unavailable The second way to load balance is to use Proto Balance Mail s pure TCP load balancer with queue monitoring Click on Add Cluster to add a pure TCP load balancer listener on port 25 Add a Box for each outoging SMTP server Set all traffic lights to yellow You now need to write scripts Copyright 2003 2010 Shine The Way 238 CC All rights reserved 25 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS that run on your SMTP server that can turn the box traffic lights from green to yellow based on the mail queue length Begin by going to the Login tab and clicking on Change password Here you will be able to enter your XML access key Let us say that your XML access key is qwerty12345 and your cluster is called Cluster001 In order to change BOX001 s traffic light to green your SMTP server needs to issue the following XML to port 8080 of Proto Balance Mail lt xml version 1 0 encoding UTF 8 gt lt green gt lt accesskey gt qwerty12345 lt accesskey gt lt clusterid gt Cluster001 lt clusterid gt lt boxid gt BOX001 lt boxid gt lt green gt If your mail queue becomes too full you can issue the XML lt xml version 1 0 encoding UTF 8 gt lt yellow gt lt accesskey gt qwerty12345 lt accesskey gt lt clusterid gt Cluster001 lt clusterid gt lt boxid gt BOX001 lt boxid gt lt yellow
22. he shared option Maximum number of per client connections Denial of service attacks might attempt to connect more often than is reasonable for a mail system This setting can provide DoS protection Copyright 2003 2010 Shine The Way 238 CC All rights reserved 13 15 2 General configuration settings 15 SETTINGS REFERENCE Maximum number of per client concurrent Denial of service attacks might attempt more concurrent connections than is reasonable for a mail system This setting can provide DoS protec tion 15 2 General configuration settings The settings under this section are under the Info tab The following settings relate to denial of service protection Delete an IP address from the dictionary The IP address dictionary is a table of remote IP addresses addresses from which Proto Balance received any kind of connection attempt The table is used for analyzing connection rates to prevent denial of service DoS attacks Specifically the Maximum number settings in the cluster configuration relate to the statistics gathered in this table If no further connection attempts come from an IP after the number of seconds indicated by this setting then the entry is removed from the table Max dictionary size in megabytes Proto Balance Mail saves memory by removing the oldest entries to keep the consumed memory below the amount specified here See Delete an IP address from the dictionary above The following settings rela
23. igured to select a random outgoing email server from among the back end servers flagged with SMTP relay Enabled This will load balance outgoing deliveries over all such servers 3 Alternatively Proto Balance Mail can be configured to use the same outgoing email server as where the mail box is stored for that sender Hence if henry org us is sending email then Proto Balance Mail will direct the session to the same server as where his mailbox is stored For this to work in your cluster configuration you must set How to choose relay box to Use box in per email config This setting has the advantage that problems sending mail can be easily diagnosed it is easy to determine which box handled the outgoing delivery Your back end email servers must be configured to trust Proto Balance Mail as follows 1 Write down the IP address of the machine on which Proto Balance Mail is running 2 Find the configuration settings for your email software on your back end mail servers 3 Find the setting for IP address ranges that are allowed to use your back end mail servers to relay mail 4 Add the IP address to this range You can configure an email client to use Proto Balance Mail for outgoing email delivery This is similar to POP authentication in the above section Proto Balance Mail supports the authentication mechanisms of LOGIN PLAIN and CRAM MD5 Once all your email clients are using Proto Balance Mail for outgoing SMTP it is
24. in wig heat ena Sie ATE ns Reema dele EEA 11 Proto Balance Mail as a Windows Service cece ce eect ee cee eect ee ee eens 12 Proto Balance Mail Command Line as a Windows Service 2 ee eee ee ee ee eee 13 Proto Balance Mail Watchdog Timer cee eee cc cece cee ee cee eee eeeees 14 Tog Eiles reatie ce E E ieee ONS See eee Pa weg Nw ore Male Pe ee EEE T Vises Pale we OO Be 15 Settings Reference runes mepende eN o e ace ce bea aa rere dpe cae Sead ah are EN eee aoe here ee 15 1 Cluster configuration settings 12 15 2 General configuration settings 14 15 3 Email and alias settings 15 T6 Spam Preventioti isc ovis iaie ane eSa E dco rs Coretta EAEE EE E EENE lo E EEEE do feet an dare fede 17 Spam Blocking Effectiveness cece ccc cee eee eee ia ia a 18 XML Interface SOA cccererson ds ete eb oe Seale SE a ale tesa g Seale edd bie Ne Hindi E eis 19 XML Command Reference cece ccc t ccc cece eee ee eee eee eee O E Er 20 Frequently Asked Questions ccc ccc ccc cece ee cee ee cee ee eee ee eee reece eee eees PROTO BALANCE MAIL USER MANUAL 2 How PROTO BALANCE MAIL WORKS 1 Introduction 1 1 Overview Proto Balance Mail is an email load balancing solution for companies universities and ISPs that host between 1 000 and 1 000 000 mail accounts Proto Balance Mail is unique in offering scalability flexibility fall over safety and security using your existing har
25. ine 2010 01 06 Wed 10 32 48 365 10 11 12 13 admin org us gt henry org us test 0kB success 250 MAIL1 250_0k_1262775853_qp_13377__ As you can see Proto Balance Mail did not queue the mail itself but directed the SMTP connection directly the appropriate mail server 5 Bulk Importing of Thousands of Email accounts After performing the above steps you can look under your configuration directory see the directory command line setting and find the file email csv The file email csv is a tab delimited file containing all email accounts added through the web page It is a flat database file Other software may have database files that are in binary format and are not human readable but this file is human readable You can flush and rewrite email csv by clicking on Vacuum Databases under the Email Database tab You can view and modify email csv so long as you keep to the precise format and provided that you vacuum the database before you make modifications Click on Re read Database when you are done with modifications Note that Re read Database deletes all records before importing email csv Therefore there may be a short period when email may fail You should therefore use Re read Database only during maintenance cycles or during non critical periods To add a large number of email accounts you need to export them as a tab delimited file The file should have three columns seperated by ASCII character 9 decimal The co
26. iry date are useful for allowing a user to run a mailing list which will send out large amounts of legitimate email for a specific time Remote deliveries A significant amount of spam uses your own user addresses as sender ad dresses By configuring this setting to Disallowed any email delivered from a remote location that maliciously uses this user s email address as a sender address will be blocked This has the disadvantage that this user will not be able to send email from a foreign SMTP service to someone at the same site For example the user will not be able to send email from the user s BlackBerry if one of the recipients is also customer of yours Therefore use with caution 16 Spam Prevention Proto Balance Mail implements the SPAM blocking technique of grey listing or Gray listing or Greylist ing Grey listing is today supported by most mail servers We recommend reading the Wikipedia entry http wikipedia org Grey_listing Grey listing requires that your organization have a single database of grey list records This means that a traditional cluster of mail servers cannot effectively implement grey listing if the nodes in the cluster separately implement the grey list algorithm Proto Balance Mail solves this problem by implementing grey listing in one place The use of grey listing does not prohibit the use of more processor intensive SPAM analysis software on your back end mail server Indeed you may continue to run
27. l this is only possible by changing the domain e g sales mycorp com eng mycorp com If you are an ISP you can put different geographic regions on different mail servers In fact you can apportion the mailboxes any way you like And relocate them whenever you like Typically Proto Balance Mail customers put 8000 mailboxes to a mail server o How does Proto Balance Mail achieve such high traffic throughput Most SMTP forwarding software receives the entire of the email storing it in a queue directory on your hard disk Proto Balance Mail does not store the email but directs the SMTP session on the fly to your email server It does this using a patented method that is also able to create concurrent duplicate sessions This means alias expansion works o How do I setup Proto Balance Mail just for blocking of spam If you are not interested in the load balancing features and just want to use Proto Balance Mail s sophisticated spam blocking functionality then you can channel just incoming email through Proto Balance Mail Consider if you have a three mailserver system as follows Copyright 2003 2010 Shine The Way 238 CC All rights reserved 23 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS Foreign SMTP delivery MX record MX record MX record Email server User POP Begin by installing Proto Balance Mail For Proto Balance Mail s spam blocking to work you need to create a flat file
28. lumns are the email address the password and the unique identifier of the box from Step 2 above If you have your email accounts stored in a database you need to consult your database documentation to allow you to export your database as plain text An example may be henry org us jdfu2bne MAIL1 bob dutchcorp nl hgew352i MAIL3 alice org us pjdyw4fl MAIL3 trudy org us zdqo2pr9 MAIL2 roger example com asdf345w MAIL2 percyQ somewhere us 768fds2i MAIL1 Extra whitespace anywhere will be interpreted literally therefore be sure that there are no spurious ASCII space characters anywhere in the file Invalid lines will be skipped Once you have your exported file in the proper format you can overwrite email csv and then click on Re read Database You can find your newly important email accounts by clicking on Search Email Copyright 2003 2010 Shine The Way 238 CC All rights reserved 7 PROTO BALANCE MAIL USER MANUAL 7 CONFIGURING POP 6 Valid Email Addresses Proto Balance Mail has a strict definition of what is considered to be a valid email address Email addresses that do not fit this definition may not be entered as an email account or appear as a sender or recipient Email addresses are case insensitive The domain part of the email address the part after the symbol may contain any of the characters 0 through 9 a through z The local part of the email address the part before the symbol may contain any cha
29. mails per IP address The number of unique sender addresses the client can use from the client s IP address If you have clients that deliver mail from behind a masquerading firewall and have a large number of desktop machines this setting may need to be increased Interval The interval of the previous setting after which the internal count is reset Spam bots tend to use a lot of different sender addresses Use an interval of between 60 and 600 minutes Distinct FROM domains per IP address The number of unique sender domains that the client can use for the client s IP address Similar to the previous setting but applying only to part of the address after the symbol Interval The interval of the previous setting after which the internal count is reset Spam bots tend to use a lot of different sender addresses Use an interval of between 60 and 600 minutes 15 3 Email and alias settings The following settings relate to configuring user accounts See under the Email Database tab These settings pertain to one individual user s personal configuration Email address This is the POP authentication login name the SMTP authentication login name and the email address of the local user account Password This is password for POP authentication It is also the SMTP AUTH authentication password for outgoing email You need not configure a password if your users are not using POP or are POPping email directly from your back end mail server
30. nt the setting Use box in per email config The mail server of the user account s Box name under the configuration for the particular senders email address If you choose Load balance over then you must ensure that at least one of your boxes has configured SMTP relay Enabled If you use choose Use box in then you must ensure that every email address in the email database has a Box name configured The latter option is useful to ensure that the same box is used for both sending and receiving email w r t a particular user Copyright 2003 2010 Shine The Way 238 CC All rights reserved 12 15 1 Cluster configuration settings 15 SETTINGS REFERENCE Max mail size in kilobytes This will cause an email to be rejected if it is over the size limit that you desire for your mail system Note that this size limit must be less than that of any of your mail server boxes For example if you have three mail servers and their respective size limits are 10M 20M and 100M then choose a value of 9000 kilobytes to be sure Allow notifications from relay clients A common source of spam are desktop machines that send emails with an empty sender address The setting Disallowed blocks this spam This will also block notifications about email being read some mail clients support such notifications however this is rarely a problem Default spam filtering This is the setting that will be substituted for any user account that has a sp
31. ords for spam analysis 6 Account access records This means that if you add or modify a new email account to one Proto Balance Mail instance then all sisters will instantly be updated with the identical account A machine on a different segment will not receive broadcast packets and will therefore not automatically be discovered Such machines can be entered manually into the setting Sister list under the Info tab For example Sister list 23 24 25 26 69 68 67 66 12 13 14 15 Next to Sisters in the top info box you can see the list of discovered sister machines An example display is as follows 12 13 14 15 tx43516 rx92675 q13 a3244 This means that sister 12 13 14 15 is connected and we have sent to it 43516 transaction records received 92675 transaction records and currently have 13 records queued for sending and allocated 3244 bytes This outgoing queue is important should sister 12 13 14 15 become unavailable then the queue will grow very large When the queue reaches 50 megabytes in size Proto Balance Mail will assume the sister is permanently discontinued The benefit of the transaction queue is that you can take down a sister and perform maintenance and when the sister is restored all queued records will be flushed and bring the sister s databases up to a current state This feature will work provided that the queue does not reach 50 000 000 bytes 10 Alias Addresses All organizations require alias addresses
32. ou can have separate email servers for each faculty or department that do not have to know about each other nor share the same file system Only Proto Balance Mail will know about all of them o Does Proto Balance Mail work with Microsoft Exchange qmail PostFix sendmail Yes Proto Balance Mail strictly implements the SMTP and POP protocols All SMTP servers are supported o Is Proto Balance Mail an MTA What is an MTA MTA means Mail Transfer Agent This is an email server like Microsoft Exchange or sendmail that receives email queues it on disk and appends it onto local mailboxes of users who have accounts within Proto Balance Mail is not this It does not store email but directs email traffic SMTP to the server suited to receive delivery Proto Balance Mail can do this even if there are ten or a hundred MTAs connected directly to it o How do I gradually migrate to Proto Balance Mail You begin by installing it on a separate machine and following the instructions in Mail User Manual However you do not need to migrate your entire system You can begin by testing a single user With some mail solutions you have to migrate all your mail servers an all or nothing affair that is risky With Proto Balance Mail you perform an incremental migration where each step is risk free and reversible Consider if you have a typical mail server deployment as follows Foreign SMTP Email J delivery server MX record POP SMTP
33. ounts the number of unique sender addresses used per IP for each of the IP addresses in the range of Client relay address ranges If this count exceeds the maximum you have specified then the IP address is blocked and appears in the blocked list under Show blocked IP addresses in the Email Database tab Note that this count applies only to sender addresses that are not in the email addresses database i e stranger email addresses Clients that exceed these limits are blocked with the error message 550 you have exceeded your mail quota contact our site administrators for more info Spam spread factor This feature is used to adjust Proto Balance Mail s proprietary suspect email analysis engine Contact us before changing this setting Client block address ranges This blocks SMTP deliveries outright from the specified address ranges Proto Balance Mail will reply with the message 550 your service has been explicitly blacklisted contact our site administrators for more info Box connect timeout in milliseconds Default for new boxes This setting does not affect already created boxes See the same setting in the box configuration Maximum number of connections Proto Balance Mail will drop new connections if the number of concurrent connections exceeds this setting If you anticipate larger load than 2000 concurrent connections see the generic user manual System Settings for High Performance and use Proto Balance Mail with t
34. oxes However the blocking effectiveness reduces with a smaller number of mail boxes In general the larger your operation then the better is Proto Balance at blocking SPAM 18 XML Interface SOA Proto Balance Mail can be accessed programmatically using a Service Oriented Architecture SOA interface based on XML Actions such as adding a new mail box configuring alias address settings changing passwords and adjusting box cluster settings these actions can all be done remotely using a programming language of your choice Please contact us for a complete repertoire of example code in Java Perl Python and other programming languages All XML actions are executed using a POST request to the URL http 1 23 45 67 8080 xm1 All XML content is of the form lt xml version 1 0 encoding UTF 8 gt lt XXX gt lt accesskey gt qwerty lt accesskey gt lt yyy gt zzz lt yyy gt lt Xxx gt Where the accesskey tag is that entered under Info Change Password A tracedump of a simple XML post say to change a user s password would be POST xml HTTP 1 0 content length 224 lt xml version 1 0 encoding UTF 8 gt lt commitmodifyemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt user _password gt 45b4a9216f9f lt user_password gt lt commitmodifyemail gt 19 XML Command Reference The following reference includes XML actions to manipulate the
35. racters except 3 lt gt The local part may also not contain characters from 0 through 32 decimal and from 127 through 159 decimal The local part may also not contain adjacent punctuation characters 7 Configuring POP To configure Proto Balance Mail so that your clients can retrieve their email POP proceed with the following steps 7 1 Step 1 Create an POP3 cluster Click on Add POP3 Cluster to create a new listener on the POP3 port The form values are similar to that for the SMTP cluster 7 2 Step 2 Add a back end mail server Under the Clusters tab click on Add box next to your POP cluster The name of the box must be entered next to Unique Identifier This must be identical to the same box as you entered in Step 2 for your SMTP cluster so that POP connections can be directed to the same back end email server for the same recipient 7 3 Step 3 Configure your email client You can now attempt to POP email with your email client Using the examples earlier the mail account henry org us with password jdfu2bnc is available You can also test the POP account be issuing a telnet to Proto Balance Mail to port 110 as follows OK lt 1262856808170 mail localdomain gt user henry org us OK pass jdfu2bnc OK quit OK Copyright 2003 2010 Shine The Way 238 CC All rights reserved 8 PROTO BALANCE MAIL USER MANUAL 8 CONFIGURING OUTGOING SMTP The OK in response to pass means t
36. reely associate aliases to other aliases in a recursive fashion Loops of aliases are handled safely 11 Proto Balance Mail as a Windows Service Proto Balance Mail installs as a Windows Service as well as a regular program under your Start menu This means you can start Proto Balance Mail by going through the menus Start Control Panel Administrative Tools Services PROTOBALANCE If you right click on PROTOBALANCE and select Properties Recovery you can set Proto Balance Mail to restart on failure 12 Proto Balance Mail Command Line as a Windows Service A windows service does not have a proper command line To set the command line arguments edit the file CMDLINE under the same directory as your executable This is usually C Program Files Proto Balance CMDLINE With the file CMDLINE you can enter options for the main log file and mail transaction log files 13 Proto Balance Mail Watchdog Timer Under Unix systems you may want to enable a watchdog timer for cases where Proto Balance Mail might exit for reasons unknown This would normally only happen for new and unstable releases The command line option watchdog will start an additional parent process to monitor and restart Proto Balance Mail if it should exit for any reason If you enable this option you can never kill Proto Balance Mail except by killing both the parent and child processes 14 Log Files The usual log file command line argument logfile can be
37. s For your users to send email you need only add their IP address ranges to Client relay address ranges in the cluster configuration Box name This is the back end mail server on which the mailbox is stored It must exactly match the name you have chosen for the box under the Clusters tab The field is case sensitive If you are using Proto Balance Mail for outgoing email and you have configured How to choose relay box to the value Load balance over then you can leave the Box name setting blank Return path equals recipient address Because a lot of spam uses identical recipient and sender return path addresses Proto Balance Mail can at the user s preference explicitly reject such email by configuring this setting to Disabled This applies to incoming email only Null return path Because a lot of spam uses null sender return path addresses Proto Balance Mail can at the user s preference explicitly reject such email by configuring this setting to Disabled Spam filtering Set the spam filtering for this user to one of Disabled Default or Greylisting The setting Default means to use the spam setting in the cluster configuration Recipients per MAIL FROM This setting is the maximum number of unique recipients that a user is allowed to deliver email to in one delivery session If the user exceeds this limit the user s recipient exceeded count is incremented If this count exceeds Recipient exceede
38. s that prevent incoming email from being delayed However it is still an acceptable solution o How do I load balance an outgoing mail queue with Proto Balance Mail This question pertains to admins who want to use Proto Balance Mail for outgoing mail and are not interested in POP or incoming SMTP You would be asking this question if you found your outgoing SMTP servers experiencing high load and very long queue lengths There are two ways to load balance outgoing SMTP The preferred way is to use Proto Balance Mail s capabilities to direct SMTP sessions Begin by adding an SMTP Cluster in the config web page Add Boxes for each outgoing mail server and set their traffic lights to green In the cluster configuration set Client relay address ranges to cover all the IP addresses that are allowed to relay email Then set Recipients per MAIL FROM to a high value like 10000 Set Allow notifications at your preference Set How to choose relay box to Load balance over SMTP relay enabled boxes Under the Info tab set the four settings Distinct FROM emails domains per IP address MAIL FROM quota and Recipient exceeded quota to a high values like 10000 Then go to each box and select SMTP relay to Enabled Such settings will result in outgoing SMTP deliveries being more or less randomly distributed be tween the boxes Proto Balance Mail will use consistent hashing based on the sender address to choose the box This means t
39. t SMTP connections are routed to the correct server Proto Balance will also ensure that POP connections are routed to the server on which the POP account is hosted Proto Balance Mail does not store or queue email but works by manipulating the SMTP session according to a patented method No other load balancing product can do this Proto Balance Mail can deliver hundreds of emails per second and scale to a large number of back end servers Multiple Proto Balance Mail instances can exist on the same segment these will automatically detect each other and keep their data in using replication Each Proto Balance Mail instance can handle up to 10 000 concurrent incoming SMTP and POP con nections Copyright 2003 2010 Shine The Way 238 CC All rights reserved 3 PROTO BALANCE MAIL USER MANUAL 3 MORE ABOUT How PROTO BALANCE MAIL WORKS 3 More About How Proto Balance Mail Works With Proto Balance Mail your own email servers receive and store email as shown in the deployment view below To give an example of its operation consider the situation of a Google Mail user sending email to you Let s say that the user is harryp gmail com and that your email account is headmaster mydomain com The user harryp gmail com will compose and send the email Google s email server will queue the email Google s email server will see that the recipient address is headmaster mydomain com and will hence lookup the MX record for mydomain com The MX r
40. te to spam blocking imposed on foreign clients meaning remote SMTP servers that attempt to deliver email to your local users Greylisting initial time The period after the first delivery attempt for which the mail delivery is rejected with a 450 temporarily unavailable error See the section Spam Prevention Greylisting initial time for suspicious email A longer initial denial period applied to email that appears to have the characteristics of spam Greylisting first window The period wherein a second or subsequent delivery attempt will be allowed If no delivery attempt happens by the end of this period the greylisting record is deleted If the delivery is allowed the greylisting record becomes a permanent record Greylisting max record age The storage period for permanent records Some implementations set this to 36 days but because of Proto Balance Mail s compact storage of greylisting records Proto Balance Mail can efficiently store a very large number of records A value of 172800 4 months is not unreasonable If you host a very large site and would like to reduce your memory consumption then this value can be set to 51840 36 days or 11520 8 days Whitelist max record age Outgoing SMTP deliveries by authenticated clients are recorded in a whitelist Proto Balance Mail consults the whitelist before deciding to greylist an incoming delivery This means that if a desktop machine sends a message to an outside mail user and t
41. ting gt 1 lt spam_setting gt lt rcpt_per_mail gt 50 lt rcpt_per_mail gt lt auto_reply_subject gt lt auto_reply_subject gt lt auto_reply_body gt lt auto_reply_body gt lt auto_reply_copy gt 1 lt auto_reply_copy gt lt auto_reply_expiry gt lt auto_reply_expiry gt lt mail_unlimited gt lt mail_unlimited gt lt mail_unlimited_expiry gt lt mail_unlimited_expiry gt Copyright 2003 2010 Shine The Way 238 CC All rights reserved 19 PROTO BALANCE MAIL USER MANUAL 20 FREQUENTLY ASKED QUESTIONS lt allow_remote_deliveries gt 1 lt allow_remote_deliveries gt lt addnewemail gt Add a new alias address lt xml version 1 0 encoding UTF 8 gt lt addnewalias gt lt accesskey gt qwerty lt accesskey gt lt alias_address gt sales example com lt alias_address gt lt alias_list gt abigail example com yolanda example com lt alias_list gt lt rept_per_mail gt 50 lt rcpt_per_mail gt lt mail_unlimited gt lt mail_unlimited gt lt mail_unlimited_expiry gt lt mail_unlimited_expiry gt lt spam_setting gt 1 lt spam_setting gt lt allow_remote_deliveries gt 1 lt allow_remote _deliveries gt lt addnewalias gt 20 Frequently Asked Questions o Can I deploy multiple Proto Balance Mail machines in a no single point of failure arrangement Yes Multiple Proto Balance Mail machines will discover each other and keep their user account databases and client access information replicated and synchronized S
42. u can divide up your email accounts into groups small enough to be managed efficiently by one email server A typical email server works well for up to 1000 email accounts Most system administrators notice that when the number of email accounts grows to larger than 1000 then significant performance degradation occurs a desktop user POPing mail becomes very sluggish the email server becomes overloaded the hard drive starts to thrash and the machine becomes unstable Most importantly it becomes extremely difficult to move or upgrade the server because so much email is stored within it With Proto Balance Mail you can add as many email servers as you like and the email servers seamlessly operate as a cluster In particular You do not need NFS or other remote file systems You do not need a clustered or other shared file system You do not need a Storage Area Network SAN expensive ouch You do not need to run any specialized software on your mail server just your regular email handling software will do The only administrative action required is to maintain Proto Balance Mail s built in database of email accounts along with the email server on which each account is hosted Copyright 2003 2010 Shine The Way 238 CC All rights reserved 4 PROTO BALANCE MAIL USER MANUAL 4 FIRST TIME CONFIGURATION outside email server Mail delivery with recipient address adam org us though zach org us Internet
43. used to specify the primary log file of Proto Balance Mail This log file contains low level error information and is not especially voluminous An additional log file specifically to show email transactions is useful for diagnostics statistics perfor mance measurement and forensics This is specified with the command line argument monthly var log maillog Copyright 2003 2010 Shine The Way 238 CC All rights reserved 11 PROTO BALANCE MAIL USER MANUAL 15 SETTINGS REFERENCE Or on Windows monthly C maillog You should be sure to create this directory beforehand These log files can grow to a large size For files that rotate daily use instead the command line argument daily var log maillog Or on Windows daily C maillog This will create a new log file every day at 00h00 GMT The log files will show all important protocol interactions and their client connection address It is advisable to study these files to see how your email is performing 15 Settings Reference All Proto Balance Mail configuration settings are explained in this section 15 1 Cluster configuration settings Unique Identifier This is the cluster name It merely needs to be unique for purposes of identification many XML commands will use this identifier SMTP host name Used for SMTP responses The SMTP protocol dictates that certain on the wire interactions include a host name and that this host name is the fully qualifie
44. y_copy gt 1 lt auto_reply_copy gt lt auto_reply_expiry gt lt auto_reply_expiry gt lt mail_unlimited gt lt mail_unlimited gt lt mail_unlimited_expiry gt lt mail_unlimited_expiry gt lt allow_remote_deliveries gt 1 lt allow_remote_deliveries gt lt commitmodifyemail gt Retrieve a user s complete configuration lt xml version 1 0 encoding UTF 8 gt lt getemail gt lt accesskey gt qwerty lt accesskey gt lt email_address gt abigail example com lt email_address gt lt getemail gt Change an alias s complete configuration lt xml version 1 0 encoding UTF 8 gt lt commitmodifyalias gt lt accesskey gt qwerty lt accesskey gt lt alias_address gt sales example com lt alias_address gt lt alias_list gt abigail example com yolanda example com lt alias_list gt lt rcpt_per_mail gt 50 lt rcpt_per_mail gt lt mail_unlimited gt lt mail_unlimited gt lt mail_unlimited_expiry gt lt mail_unlimited_expiry gt lt spam_setting gt 1 lt spam_setting gt lt allow_remote_deliveries gt 1 lt allow_remote deliveries gt lt commitmodifyalias gt Retrieve an alias s complete configuration Copyright 2003 2010 Shine The Way 238 CC All rights reserved 18 PROTO BALANCE MAIL USER MANUAL 19 XML COMMAND REFERENCE lt xml version 1 0 encoding UTF 8 gt lt getalias gt lt accesskey gt qwerty lt accesskey gt lt alias_address gt sales example com lt alias_address gt lt get
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