Hi, Thank you for your help.
I have some news about this bug. I changed the Postfix config to activate debug log. And I have caught some errors "wrong MX error". Complete debug logs are attached. Here an example with all debug logs. We can see just after a Gmail transaction, the Postfix process tries to deliver a mail for [email protected]. And the DNS reply give the good MX answer : Mar 1 09:35:50 ns302430 postfix/smtp[1581]: begin ac-rennes.fr address list Mar 1 09:35:50 ns302430 postfix/smtp[1581]: pref 20 host mxsrv2.ac-rennes.fr/195.221.67.38 Mar 1 09:35:50 ns302430 postfix/smtp[1581]: pref 20 host mxsrv1.ac-rennes.fr/195.221.67.29 Mar 1 09:35:50 ns302430 postfix/smtp[1581]: end ac-rennes.fr address list But, we can see just after that scache give a Gmail connexion !!! Mar 1 09:35:50 ns302430 postfix/smtp[1581]: private/scache: wanted attribute: property Mar 1 09:35:50 ns302430 postfix/smtp[1581]: input attribute name: property Mar 1 09:35:50 ns302430 postfix/smtp[1581]: input attribute value: gmail.com?gmail-smtp-in.l.google.com?64.233.167.27?4096 Mar 1 09:35:50 ns302430 postfix/smtp[1581]: scache_clnt_find_dest: dest=smtp?*? dest_prop=gmail.com?gmail-smtp-in.l.google.com?64.233.167.27?4096 endp_prop=0?31?1456821449 fd=16 Mar 1 09:35:50 ns302430 postfix/smtp[1581]: smtp_session_activate: dest=gmail.com host=gmail-smtp-in.l.google.com addr=64.233.167.27 port=25 features=0x101f, ttl=99, reuse=1 And the process try to deliver the mail to a wrong MX server... Mar 1 09:35:50 ns302430 postfix/smtp[1581]: > gmail-smtp-in.l.google.com[64.233.167.27]:25: RSET Mar 1 09:35:50 ns302430 postfix/smtp[1581]: > gmail-smtp-in.l.google.com[64.233.167.27]:25: MAIL FROM:<SIGMLRA47_npai+YYYACRENNESUSERYYY=ac-rennes.fr.100827...@mlg-events.net> SIZE=27032 Mar 1 09:35:50 ns302430 postfix/smtp[1581]: 0D5F218551A: to=<[email protected]>, relay=gmail-smtp- in.l.google.com[64.233.167.27]:25, conn_use=2, delay=582, delays=0.11/581/0.01/0.09, dsn=5.1.1, status=bounced (host gmail-smtp- in.l.google.com[64.233.167.27] said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/answer/6596 x64si24468451wmx.5 - gsmtp (in reply to RCPT TO command)) Note : 1. This bug is rare : most of the time Postfix deliver emails correctly 2. Each time the bug occurs, it's when before there were a TLS error with Gmail and the connection is "scached" (private/scache) / reuse=1 / conn_use=2 3. I have all the debug logs you want and other examples of this bug for yesterday Can this help ? ** Attachment added: "debug_log.txt" https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1549388/+attachment/4585498/+files/debug_log.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1549388 Title: In some rare cases Postfix connect to a wrong MX server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1549388/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
