On 7/2/25 17:21, Steve Brown via Mailman-users wrote:
In a list I administer, the From line in an incoming email shows [Poster's Name] via [List Name] <address for posting a reply> . I use Outlook as my client, but at least some other clients behave similarly. However, I have at least one subscriber who uses Mozilla's Thunderbird as his client, and periodically the format changes to something else, most recently to just [List Name <address for posting a reply> . I suspect this occurs from some combination of the way Thunderbird parses the header and the way it populates some kind of address book that makes autofill work, but I'm not sure. Is this a known problem? Is there an easy fix that will be stable? In the past, putting an association in his address book and removing others worked, but it didn't hold and he is frustrated.
This From: is the result of DMARC mitigations. The actual From: header in the email is
From: [Poster's Name] via [List Name] <address for posting a reply>
where [Poster's Name] is the first non-empty value from
- the display name in the original From:
- tne display name in the posters member record
- the poster's email address with the domain replaced with
---
How this header is rendered by any particular mail client (MUA) is up to that MUA and not something you can control.
Note however that I use T-bird as my MUA and T-bird displays the From: in your mail from the list as
From Steve Brown via Mailman-users <mailman-users@mailman3.org>
Also, Mailman puts your original From: in a Reply-To: which T-bird displays as
Reply-To Steve Brown <drstephenlbrown@gmail.com>
Depending on your list's settings, the original From: might be in Cc: rather than Reply-To:
And, if the T-bird user really needs to see the poster's name and it's not in any displayed headers, they can always view the source of the message and see the From: there.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan