On 2023-03-07 at 13:27:41 UTC-0500 (Tue, 07 Mar 2023 13:27:41 -0500)
postfix--- via Postfix-users <post...@ptld.com>
is rumored to have said:

Reviewing logs I notice many soft bounces from the new list. Some emails from the new list have been accepted and I don't understand what the differences are. I have not seen these types of errors before and don't understand what is causing them. Here are just two examples:

[...]

Mar 7 13:05:27 host postfix/cleanup[1152719]: warning: milter unix:/var/run/opendmarc/opendmarc.sock: can't read SMFIC_BODYEOB reply packet header: Success Mar 7 13:05:27 host postfix/cleanup[1152719]: 4PWNdy5lkcz4l3gy: milter-reject: END-OF-MESSAGE from list.sys4.de[188.68.34.52]: 4.7.1 Service unavailable - try again later; from=<postfix-users-boun...@postfix.org> to=<post...@ptld.com> proto=ESMTP helo=<list.sys4.de> Mar 7 13:05:27 host opendmarc[1877]: terminated with signal 11, restarting

[...]

[...]

Mar 7 13:18:58 host postfix/cleanup[1153970]: warning: milter unix:/var/run/opendmarc/opendmarc.sock: can't read SMFIC_BODYEOB reply packet header: Success Mar 7 13:18:58 host postfix/cleanup[1153970]: 4PWNxY2dFlz4l3gy: milter-reject: END-OF-MESSAGE from list.sys4.de[188.68.34.52]: 4.7.1 Service unavailable - try again later; from=<postfix-users-boun...@postfix.org> to=<post...@ptld.com> proto=ESMTP helo=<list.sys4.de> Mar 7 13:18:58 host opendmarc[1877]: terminated with signal 11, restarting


What is broken on my end causing these DMARC SMFIC_BODYEOB errors?

OpenDMARC is segfaulting. That's what 'signal 11' means. Postfix fails to get an answer to its end-of-body milter call because of the segfault closing the other end of that socket. That failure results in Postfix sending a 4xx to the client.

First step is to verify your installation of OpenDMARC. Make sure you have a current version, that its dependencies are consistent with the build, etc.

--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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