On 10/20/21 12:58 PM, Bruce Johnson via Mailman-Users wrote:
Thinking more upon this I think this was why we originally had the email hostname set to the list server FQDN instead of our domain. originally mailman lived on our mail server, but got moved to a different system when we moved to Exchange for mail (and later on to O365) We had to create weird distribution lists for all the lists ( ie: a DL test@pharmacy.arizona.edu that has as it’s only member test@lists.pharmacy.arizona.edu ) for everything to work.
This worked well for years until we moved to a new mail spam and security service and introduced stricter DMARC and DKIM settings for all our mail. This is what broke one of our larger lists (our alumni outreach list, and of course it’s Homecoming next week, and the last email resulted in 650+ bounces for DMARC failures..mostly from aol and yahoo. )
Is it possible to have the email addresses of the mailman administrivia addresses (-owner -bounces, etc) be the FQDN, but outgoing list traffic be set to just the domain?
You could try this patch === modified file 'Mailman/MailList.py' --- old/Mailman/MailList.py 2020-05-18 17:01:51 +0000 +++ new/Mailman/MailList.py 2021-10-20 20:31:06 +0000 @@ -190,7 +190,8 @@ def getListAddress(self, extra=None): if extra is None: return '%s@%s' % (self.internal_name(), self.host_name) - return '%s-%s@%s' % (self.internal_name(), extra, self.host_name) + return '%s-%s@%s%s' % (self.internal_name(), extra, 'lists.', + self.host_name # For backwards compatibility def GetBouncesEmail(self): And a similar patch to the get_site_email function in Mailman/Utils.py. -- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan