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[9.307] SMTP "Unrouteable address" instant bounce for a previously working domain

Hello,
today i started getting this error for a specific mail address which yesterday received mails succesfully.
Mail manager shows a single line of
2015-02-19 09:01:41 routing failed for email@domain: Unrouteable address

there's no retry, no nothing, yesterday it was working perfectly.

SMTP log is the same line, accepts the mail, process queue, instant bounce

i checked DNS resolution for the domain(br.bosch.com) and works ok returning two different mailservers (in germany) [:S]
Both servers respond to telnet on port 25 ok

In any case, even if both servers would fail to answer it should stay in the retry queue NEVER instantly bouncing.

what's going on?


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Parents
  • Mast, check #1 in Rulz about 2015-02-19 09:01.  Any luck with that?

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Did we ever find out what caused this?

    I'm suffering from some odd issues like this since switching my outbound mail to go through the UTM.

    If I send directly from Exchange, the mail goes so the UTM is having an effect on mail. 99% is fine but you get the other odd bit that isn't and the logs don't give much of a clue.

  • Please show the SMTP log lines for one such email.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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