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Mails getting delayed and failing

PepijnDeneut
Hello,

We have complaints that we can't receive mails from different parties.
These are mostly small parties, outlook.com, gmail.com ect works fine.
They get errors like:#550 4.4.7 QUEUE.Expired; message expired ##
The problem is we don't see anything in the smtp log.
Anyone has an idea?

Thanks


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  • 0
    It's difficult to imagine what they're describing as coming from the SMTP Proxy.  Are your authoritative name servers functioning correctly?  Can you get a copy of such an error message complete with the headers?

    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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  • 0
    It's difficult to imagine what they're describing as coming from the SMTP Proxy.  Are your authoritative name servers functioning correctly?  Can you get a copy of such an error message complete with the headers?

    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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