Good day,
I have been having 2 issues. 1. When an email is received with a null from field it bypasses all the spam filtering. As well It does not show up in the Tracking Center at all.
026-05-29T12:57:03.346227-04:00 mail postfix/qmgr[1131]: 4716E20023: from=<>, size=6429, nrcpt=1 (queue active)
2026-05-29T12:57:03.346359-04:00 mail pmg-smtp-filter[1141]: 2013B6A19C55F43565: accept mail to <info@DOMAIN.NET> (4716E20023) (rule: default-accept)
2026-05-29T12:57:03.349266-04:00 mail postfix/smtpd[2085]: proxy-accept: END-OF-MESSAGE: 250 2.5.0 OK (2013B6A19C55F43565); from=<> to=<info@domain.net> proto=ESMTP helo=<[10.88.0.3]>
I had been troubleshooting a way around this issue with Claude.ai without success.
update: work around on the mail server to block any emails that Return-Path' header matches the following patterns: '<>'. At the moment I have it set to send it to me for approval incase its a legit email.
I have been having 2 issues. 1. When an email is received with a null from field it bypasses all the spam filtering. As well It does not show up in the Tracking Center at all.
026-05-29T12:57:03.346227-04:00 mail postfix/qmgr[1131]: 4716E20023: from=<>, size=6429, nrcpt=1 (queue active)
2026-05-29T12:57:03.346359-04:00 mail pmg-smtp-filter[1141]: 2013B6A19C55F43565: accept mail to <info@DOMAIN.NET> (4716E20023) (rule: default-accept)
2026-05-29T12:57:03.349266-04:00 mail postfix/smtpd[2085]: proxy-accept: END-OF-MESSAGE: 250 2.5.0 OK (2013B6A19C55F43565); from=<> to=<info@domain.net> proto=ESMTP helo=<[10.88.0.3]>
I had been troubleshooting a way around this issue with Claude.ai without success.
update: work around on the mail server to block any emails that Return-Path' header matches the following patterns: '<>'. At the moment I have it set to send it to me for approval incase its a legit email.
Last edited: