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:

MimeDel

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

Moderate

  • 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

Scrubber

  • 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)

SpamDetect

  • 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

MailmanWiki: DOC/Why are incoming messages being automatically discarded? (last edited 2019-10-01 18:55:10 by msapiro)