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Greylisting causing relay denied bounce at senders server

Gazsa
we have a number of customers using astaro for antispam and we have just come accross a problem - the senders emails reaches the astaro gateway which in turns sends the 'temporary local problem' message back.

Instead of the senders server trying to send the message again it generates an ndr 

'The e-mail account does not exist at the organization this message was sent to.  Check the e-mail address, or contact the recipient directly to find out the correct address.
            '

Any ideas?


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  • 0
    Hi, Gazsa, and welcome to the User BB!

    It looks like the sender's mail server isn't working correctly. The easiest thing to do is to add an Exception to your customer's Astaro so that emails from the sender in question are not greylisted.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0
    Just figured out the problem I think - the customer has 2 mx records setup. the first is the actual mail server of the customer.

    The 2nd is a mail server that the isp has setup by default. I have just telnet'ed to the 2nd mail server and low and behold get the exact message as the NDR.

    I am guessing that when Astaro sends the 'temporary local error' the sending mail server then trys to send to the 2nd mail server listed in the mx records.
  • 0
    Ah-hah!  Of course!  Thanks for posting what you found!  I don't think that's the right thing for the sender's server to do, but at least it's now clear where the phantom response came from!

    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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