Why are incoming messages being automatically discarded?

From the post at https://mail.python.org/pipermail/mailman-users/2016-July/081004.html, the handlers that do the discarding and their reasons are:


  • content filtering removes the entire message and filter_action is other than Reject


  • a post is from a moderated member with member_moderation_action Discard
  • a post is from a non-member in discard_these_nonmembers or with generic_nonmember_action Discard


  • if the top level MIME type is text/html and ARCHIVE_HTML_SANITIZER = 0 (not the default, and this only applies if scrub_nondigest is Yes)


  • when a message matches KNOWN_SPAMMERS
  • A post is From: a domain with DMARC p=reject (or maybe quarantine) and dmarc_moderation_action is Discard
  • a message matches header_filter_rules with Discard action or with Reject action and the message is to -owner

Note that Mailman >= 2.1.19 logs the name of the handler in the vette log discard entry.

MailmanWiki: DOC/Why are incoming messages being automatically discarded? (last edited 2020-07-21 17:41:20 by msapiro)