On 6/20/20 4:39 PM, Johannes Rohr wrote: > Am 20.06.20 um 19:37 schrieb Mark Sapiro: >> On 6/20/20 5:52 AM, Johannes Rohr wrote: >>> Hi, >>> >>> yesterday, I member tried multiple times to send a to a list, from a >>> roundcube webmailer which is running on the same host as mailman itself. >>> The message is in plain text without any attachments, no HTML either. >>> Yet it was silently discarded by mailman. In /var/log/mailman/vette I >>> find the message >>> >>> Jun 19 21:02:42 2020 (14835) Message discarded, msgid: <************@***>' >>> list: ******, >>> handler: SpamDetect >> There are 3 reasons why SpamDetect can discard a message. >> >> 1) (not likely) The message contains a header with value matching a >> header/regexp combination in mm_cfg.KNOWN_SPAMMERS which is empty by >> default. >> >> 2) The message is from a sender in a domain publishing a DMARC policy of >> reject or possibly quarantine and the list's Privacy options... -> >> Sender filters -> dmarc_moderation_action is Discard. > Thanks, Marc, a lot for the explanation!!! Very helpful!! Now, for the > messages that got rejected, none of the three reasons apply. However, in > /var/log/mailman/error, I see the message I wrote about " DNSException: > Unable to query DMARC policy for *** (_dmarc.***.org). The DNS operation > timed out." with both the time and sender address matching the rejected > message. So could it be that mailman treats a failed DMARC DNS query as > if the domain in question had set its DMARC policy to "reject" or > "quarantine"? > > And in our case, I feel that disabling this kind of checks altogether > would make sense, given that all mail is parsed by rspamd before it is > handed over to mailman. rspamd does an outstanding job, therefore, I > don't think that there is a need for mailman to parse messages for spam. > > Cheers, > > Johannes > Marc can confirm, but I do believe that a failed DNS Query is treated as if the policy was reject, on the theory that it is better to mitigate in error than to not mitigate in error.
Having a policy of discard would make that assumption not so good (it is probably more common to munge or wrap) -- Richard Damon ------------------------------------------------------ Mailman-Users mailing list -- mailman-users@python.org To unsubscribe send an email to mailman-users-le...@python.org https://mail.python.org/mailman3/lists/mailman-users.python.org/ Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: https://www.mail-archive.com/mailman-users@python.org/ https://mail.python.org/archives/list/mailman-users@python.org/
