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Mail rejected "550 Administrative prohibition"

Hello, again wo can't send mails to part of our customers. Error Message returnes:

This message was created automatically by the SMTP relay on xxxx

 

A message that you sent could not be delivered to all of its recipients.

The following address(es) failed:

 

  customers@xxx.de

    SMTP error from remote mail server after end of data:

    host mail.xxx: 550 Administrative prohibition

 our Server is not blacklistet. Any ideas? Thank you

Found only the old topic, seams Sophos problem on blacklist...



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Parents Reply
  • CYREN is a separate company that provides the service to others, so it's not just Sophos devices that will use that information to reject mail from IPs identified as spammers.  Do you still get rejections after getting your mail server off CYREN's list?  

    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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