On 9/20/20 3:45 PM, Thomas Gramstad wrote: > On a new list I have created, some subscribers seem to receive only some > of the postings to the list, not all the postings, in a seemingly random > way. > > The missing posts are not in the recipients' spam filters. I suspect > this may be related to complications related to the newer anti-spam > methods SPF, DMARC, DKIM. I don't know how those things work, and I have > the default settings (in Mailman 2.1.29) for them. > > What can I do to improve message delivery?
Publish an appropriate SPF record and DKIM sign outgoing list mail. These are outside of Mailman (DNS and the MTA). Within mailman, ensure you have DMARC mitigations enabled. Most people find Privacy options... -> Sender filters -> dmarc_moderation_action = Munge From and Privacy options... -> Sender filters -> dmarc_quarentine_moderation_action = Yes to be what they want. It can also help with some ISPs to publish a DMARC policy for your domain in DNS, even if it is p=none. Beyond that, do the messages bounce? I.e. are there entries in Mailman's bounce log. Also, what do the MTA logs say about these deliveries? -- Mark Sapiro <m...@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan ------------------------------------------------------ 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/
