Unknown Mail Transport error

Discussion in 'General' started by Chris23, Aug 21, 2019.

  1. Chris23

    Chris23 New Member

    Hi,
    Having quite a few issues with mails that are getting deferred with (unknown mail transport error)
    Nothing has changed in main.cf or master.cf - so not sure where to check. Have done a postfix reload and postsuper -r
    relay=none, delay=1.6, delays=0.57/1/0/0.01, dsn=4.3.0, status=deferred (unknown mail transport error)

    Any advice here?
     
  2. Chris23

    Chris23 New Member

    Just some more info :
    [email protected]:/etc/postfix# less /var/log/mail.log | grep -i 2EBB240E16
    Aug 21 10:52:20 smtp-02 postfix/smtpd[21316]: 2EBB240E16: client=localhost[127.0.0.1]
    Aug 21 10:52:20 smtp-02 postfix/cleanup[22117]: 2EBB240E16: message-id=<[email protected].PROD.OUTLOOK.COM>
    Aug 21 10:52:20 smtp-02 postfix/qmgr[20247]: 2EBB240E16: from=<[email protected]****.co.za>, size=104257, nrcpt=1 (queue active)
    Aug 21 10:52:20 smtp-02 postfix/smtp[22942]: 597C241454: to=<[email protected]****.com>, relay=127.0.0.1[127.0.0.1]:2526, delay=56, delays=56/0/0/0.64, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 2EBB240E16)Aug 21 10:52:20 smtp-02 postfix/error[23098]: 2EBB240E16: to=<[email protected]****.com>, relay=none, delay=0.64, delays=0.64/0/0/0, dsn=4.3.0, status=deferred (unknown mail transport error)
     
  3. Taleman

    Taleman Well-Known Member HowtoForge Supporter

    According to Internet Search Engines with
    Code:
    postfix "unknown mail transport error"
    reason could be mail aliases. If Recipient address has aliases, maybe one of them does not exist?
     

Share This Page