Postfix: Lost connection while receiving initial greeting

Discussion in 'Server Operation' started by Salim Hoolash, Jan 31, 2013.

  1. Salim Hoolash

    Salim Hoolash New Member

    Dear All,

    First of all, thank you in advance for your help. I had a server running Ubuntu 10.10 with postfix as MTA and mails were being sent out. I just replaced the server wih a new one running Ubuntu 12.10 and suddenly no mails are sent out.
    postqueue -p output yields:
    (lost connection with mail.example.com[10.XXX.XXX.49] while receiving the initial server greeting)
    However when I try telnet 10.XXX.XXX.49 25, I am connected to the mail server and I can send a mail using ehlo, mail from, rcpt to etc.
    Any idea what may be wrong?
    Thanks.
     
  2. falko

    falko Super Moderator ISPConfig Developer

    Are there any errors in your mail log (in the /var/log/ directory)?
     
  3. Salim Hoolash

    Salim Hoolash New Member

    falko,

    Thanks for the reply.

    Code:
    Feb  4 11:50:52 Nagios-PC postfix/qmgr[12807]: C98AA11CB000: from=<root@PACE-Alarms>, size=321, nrcpt=1 (queue active)
    Feb  4 11:51:13 Nagios-PC postfix/smtp[21065]: C98AA11CB000: to=<[email protected]>, relay=mail.mauritiustelecom.com[10.225.225.49]:25, delay=20, delays=0.14/0/20/0, dsn=4.4.2, status=deferred (lost connection with mail.mauritiustelecom.com[10.225.225.49] while receiving the initial server greeting)
    Feb  4 11:57:04 Nagios-PC postfix/qmgr[12807]: C98AA11CB000: from=<root@PACE-Alarms>, size=321, nrcpt=1 (queue active)
    Feb  4 11:57:25 Nagios-PC postfix/smtp[12358]: C98AA11CB000: to=<[email protected]>, relay=mail.mauritiustelecom.com[10.225.225.49]:25, delay=392, delays=371/0.01/21/0, dsn=4.4.2, status=deferred (lost connection with mail.mauritiustelecom.com[10.225.225.49] while receiving the initial server greeting)
    Feb  4 12:07:04 Nagios-PC postfix/qmgr[12807]: C98AA11CB000: from=<root@PACE-Alarms>, size=321, nrcpt=1 (queue active)
    Feb  4 12:07:25 Nagios-PC postfix/smtp[16287]: C98AA11CB000: to=<[email protected]>, relay=mail.mauritiustelecom.com[10.225.225.49]:25, delay=992, delays=972/0.01/20/0, dsn=4.4.2, status=deferred (lost connection with mail.mauritiustelecom.com[10.225.225.49] while receiving the initial server greeting)
    Salim.
     
  4. falko

    falko Super Moderator ISPConfig Developer

  5. Salim Hoolash

    Salim Hoolash New Member

    SOLVED: Postfix - Lost connection while receiving greeting

    falko,

    You put me on the right track. Since our mail server is on a private address, I could not verify whether my IP address was blacklisted with the site you mentioned. So, after investigation with my ISP provider, I found out that they have 2 mail relay servers one on address 10.XXX.XXX.49 and the other on 10.XXX.XXX.50. I figured out that I could not authenticate on the '50' one but it was OK on the '49' one. So, instead of having 'relayhost = Blank' in /etc/main.cf, I added relayhost = 10.XXX.XXX.49 thus forcing mails from my server to relay through address '49'. Now, mails are flowing without problem.

    Thanks a lot for your help.
     

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