On 7/2/25 22:11, Steve Brown via Mailman-users wrote:
I may include more info than you really want to know.  Here is the gist of the 
complaint:

"For a while now, my e-mail for this list (but not other lists) just shows "To RADG" from 
"RADG" with a "CC" showing the actual sender's address.
That becomes a PITA when I need to find a post by a particular person, because the 
e-mail list does not show the CCs in the list, so I need to open each one to see who 
actually sent it."


The user is using T-bird and does not need to scroll through the email list to find a post from a particular user. They should be using quick filter for this. I will send you more detail about this off list as details about the T-bird UI are off topic here.

This subscriber is not very savvy about email, and doesn't seem to understand 
fully when I tell him how it works, so if I start talking about headers, that's 
a PITA, too.  He claims:

"RADG is the only list that is afflicted by this, out of 21 that include groups.io, 
yahoo, google, Lyris, and probably a few I don't recall."

Because some other members, including me, have had problems with unexpected entries in 
both From and To lines, I suspect that Mailman 3 does the DMARC enough differently than 
other lists and forums to cause conflicts with the way the MUAs try to help the user 
autocomplete an address.  Most of those problems go away if they put an association of 
RADG (Risk Analysis Discussion Group) with r...@lists.radg.us in their address book.  We 
chose the "use your own URL" option.  The actual server address is 
deu.mailmanlists.eu; I don't know whether their customization of the MM3 installation 
might cause some of the problem.

My understanding is that all of the recent posts are missing the poster's name, 
after behaving as expected for some time.  Something must have changed, but 
what is baffling me.  If you have any further ideas, fine, but don't waste a 
lot of time on this.


Mailman, both 2.1 and 3, have been modifying the From: header for DMARC in exactly the same way for years. If anything changed is this regard it is specific to the deu.mailmanlists.eu installation, but I doubt it was Mailman that changed, particularly because you are still seeing the From: as it always was. It is much more likely that the users T-bird changed.

--
Mark Sapiro <m...@msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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