Peter Simons wrote:
Hi Per,
AFAICT, mailman offers only two (marginally useful) options, per list - replace from with list address or wrap message in an outer message. Neither is of much use to us, we don't want the From: address to change.
you realize, though, that it's impossible to keep "From:" as-is if you want to deliver postings reliably to all recipients?
Well, for at least the last four years, it has not caused us any problems. (i.e. I haven't seen any tickets nor have I heard anyone complain).
If you keep the original "From:", then those the postings will potentially fail the SPF check. I have that exact problem with my private domain cryp.to. I cannot post as simons@cryp.to to mailing lists that don't re-write "From:" because sites like gmail.com will reject those messages. When I found out about that, I could not believe that they would check the SPF records against the "From:" header found in the message payload, but, well, they do.
That is certainly non-standard. It should really only be checked on the envelope address. Besides, if we were to fiddle with the From: header, the DKIM validation would likely fail.
What would you expect Mailmain to do that it doesn't?
Well, optimally we would want to keep our [LISTNAME] Subject prefix and our helpful footer :-)
You can! All you have to do is to make sure that your mail server creates a proper DMARC signature and rewrites the "From:" header for those addresses that have SPF records defined. That's exactly how I run my lists in mailman and it works fine.
Well, I should obviously have re-iterated our objective#1: keeping the From: header intact. Anyway, isn't this all a bit off topic here on this list? -- Per Jessen, Zürich (1.6°C) Member, openSUSE Heroes