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Mail rejected "550 Administrative prohibition"

HansiMüller

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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  • 0

    I believe that you would still have to request to be delisted by them. The error is coming from the remote server, not your own.

    Have you checked more than one source for IP blacklisting?

    b.barracudacentral.org
    bl.spamcop.net
    dnsbl.sorbs.net
    spam.dnsbl.sorbs.net
    ips.backscatterer.org
    zen.spamhaus.org
    ipcheck.proofpoint.com

    OPNSense 64-bit | Intel Xeon 4-core v3 1225 3.20Ghz
    16GB Memory | 500GB SSD HDD | ATT Fiber 1GB
    (Former Sophos UTM Veteran, Former XG Rookie)

  • 0 in reply to Amodin

    hi, yes request to remove already done twice. Checked all spam list from mxtoolbox, no listing for our server

  • 0 in reply to HansiMüller

    Are you only getting this with one sender or anyone that sends email to that domain?

    OPNSense 64-bit | Intel Xeon 4-core v3 1225 3.20Ghz
    16GB Memory | 500GB SSD HDD | ATT Fiber 1GB
    (Former Sophos UTM Veteran, Former XG Rookie)

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