Mail Protection: SMTP, POP3, Antispam and Antivirus Mail rejected "550 Administrative prohibition"

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Mail rejected "550 Administrative prohibition"

Chris Führich over 3 years ago

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 Amodin over 3 years ago

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)
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0 Chris Führich over 3 years ago in reply to Amodin

still same probleme, why doesn't SOPHOS take care of this??????
realy disappointed about this! for 1 week we can not send mails to a lot of our customers.

community.sophos.com/.../550-administrative-prohibition-issues-due-to-confirmed-spam
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0 BAlfson over 3 years ago in reply to Chris Führich

Hallo Hansi,

As I said in the thread you linked to in your last post, the solution is to set 'Reject at SMTP time: Off' and 'Confirmed spam action: Quarantine'.

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 BAlfson over 3 years ago in reply to Chris Führich

Hallo Hansi,

As I said in the thread you linked to in your last post, the solution is to set 'Reject at SMTP time: Off' and 'Confirmed spam action: Quarantine'.

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 Chris Führich over 3 years ago in reply to BAlfson

Hello Bob, there is no reason for listing OUR Mailserver on the sophos Cyren Blacklist. We can't call 100 companys to aks them to put an exception for our E-Mail Server! Thats a sophos Problem and i wan't to know why we are listet on this list.
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0 BAlfson over 3 years ago in reply to Chris Führich

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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0 Chris Führich over 3 years ago in reply to BAlfson

yes still blocked
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