Hello everyone, I hope this email made it to the list. It has been crazy for a week.
My SPF/DKIM/DMARC passes in most cases except for mailing lists. Recently, I observe that when I send emails to mailing lists, they get stashed after Mailman receives them. I administer Mailman for an organization, and this is what I am seeing: The email from my VPS arrives at the organization's server and passes authentication (including SPF/DKIM/DMARC checks) If the address is not a mailing list, dovecot delivers the email to local/virtual accounts without errors. It is all fine for regular destinations. If the address belongs to a mailing list, Mailman receives the email and includes it in the archives. Something goes wrong at this stage (i.e. when Mailman begins to send copies to subscribers). The log records the following: Jul 01 11:51:35 mail.organization.com opendkim[663]: 40D84274532: no signing table match for 'onye...@mydomain.com' Jul 01 11:51:35 mail.organization.com opendmarc[826730]: 40D84274532: mydomain.com fail It appears the mail server hosting Mailman on the other end wants to sign my email all over again before sending out copies to the list subscribers. The signing fails for obvious reasons. The host cannot possibly have signing keys for every subscribed domain on the list. The result is that Mailman archives an email that subscribers never see. Is any other list admin experiencing this? What do I do to get such emails to the list subscribers? How about lists that I subscribed to (the ones I do not administer?). Does the sender have any obligation too? This phenomenon is crazy. worriedly Onyeibo ------------------------------------------------------ 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/
