On 9/28/25 07:27, [email protected] wrote:
Specifically the kind where all list emails come from the the same address, 
with the sender in Reply-To?

It seems like this /should/ be the way it works. Isn't that what Reply-To is 
for?

Do some email clients still mess it up? If they do, wouldn't it make sense to 
just send them a bounce notice and tell them to clean up their act?


See https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/handlers/dmarc.py?ref_type=heads#L66-L85 for what we say about this.

I'm guessing that your concern is that a `reply` as opposed to `reply all` should go to the poster and not to the list. I think that will be the case with most mainstream MUAs, but RFC 5322 is somewhat wishy-washy about that saying only "When the "Reply-To:" field is present, it indicates the address(es) to which the author of the message suggests that replies be sent."

--
Mark Sapiro <[email protected]>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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