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--- aix:sendmail [2021/01/01 21:21]
127.0.0.1 external edit
+++ aix:sendmail [2022/12/19 23:50] (current)
manu
@@ Line 1: / Line 1: @@
 ===== Sendmail on AIX =====
+https://www.ibm.com/support/pages/configuring-masquerading-aix-sendmail-using-generics-table
+https://www.ibm.com/support/pages/how-disable-recipient-domain-lookup-sendmail
+ways to deploy sendmail:
+  * using **submit.cf** file, for AIX 7.2TL4 and later
+  * using **sendmail.cf**
+===== submit.cf =====
+A workaround to prevent using submit file, is to crate a symbolic link between **/etc/mail/sendmail.cf** and **/etc/mail/submit.cf** (check section [[aix:sendmail#sendmail_configuration|sendmail.cf]])
+https://www.ibm.com/support/pages/how-run-two-sendmails-one-mtamail-transfer-agent-and-another-msamail-submission-agent
+How to run two sendmails, one for MTA(Mail Transfer Agent) and another for MSA(Mail Submission Agent).
+===== sendmail.cf =====
 For more secure sendmail in AIX 7.2 TL4
   https://www.ibm.com/support/knowledgecenter/ssw_aix_72/s_commands/sendmail.dita
+https://www.ibm.com/support/pages/node/6378270?myns=aix&mynp=OCSG11S&mync=E&cm_sp=aix-_-OCSG11S-_-E
+<cli>
+Sendmail was updated in newer AIX versions and it works differently
+now, it requires sendmail running to send and receive emails
+"AIX® version AIX 7 with 7200-03 and earlier used sendmail.cf
+configuration file for the sendmail command. Starting with AIX
+version AIX 7 with 7200-04 two configuration files sendmail.cf
+and submit.cf are installed. The sendmail command uses the
+submit.cf configuration file by default. The sendmail.cf file
+exists for compatibility with earlier versions of the sendmail
+command. The following
+information is valid for both sendmail.cf and submit.cf
+configuration files."
+</cli>
+<cli>
+You can read more about this here: https://www.ibm.com/docs/en/aix/7.2?topic=files-sendmailcf-submitcf-file
+</cli>
 ==== Sendmail configuration ====
@@ Line 60: / Line 101: @@
   * Listening on port 25/tcp for incoming messages from outside of the machine
   * Flushing the local queue of unsent messages on a periodic basis
+===== aliases =====
+alias configuration for sendmail in MSP mode (applicable only beyond AIX version 7200-04-02).
+To configure the aliasing in sendmail, which runs in mail submission program mode (MSP).
+Mail aliasing in sendmail, which is being run in mail submission program mode.
+Steps
+To configure the alias while sending a mail with sendmail in Mail Submission Program mode. Mailer flag in /etc/mail/submit.cf file should be modified to add alias flag "A" as part of F attribute.
+Sample change to mailer flag in "/etc/mail/submit.cf" :
+  Mlocal, F=lmDFMuXkw5
+  to
+  Mlocal, F=lmDFMAuXkw5
+Alias flag "A" is added to mailer as part of F attribute as shown above.
+When adding a new alias into /etc/mail/aliases
+Ex:
+  TEST: user@machine
+  testalias: TEST
+The /etc/mail/aliases file is a raw data file. The sendmail command uses a database version of this file. You must build a new alias database by running the sendmail -bi command or the newaliases command before any changes made to the /etc/mail/aliases file become effective.
@@ Line 118: / Line 187: @@
 Test the communication with your mail server:
+An easy way to test by using
+  stoprsc -s sendmail
+  /usr/lib/sendmail -v -q30s -X /tmp/sendmail.debug
 **telnet mail.test.com 25**
@@ Line 225: / Line 298: @@
                 T=DNS/RFC822/SMTP,
                 A=TCP $h
+</cli>
+===== Debug / trace =====
+<cli prompt="#">
+# startsrc –s iptrace –a "-b 2000000000 –p 25,53 /tmp/iptrace.log"
+# echo "test" | mail –v "test email" email@test.com > /tmp/mail_test.log
+# stopsrc -s iptrace
 </cli>

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