On 19 May 2025, at 10:30, Benny Kjær Nielsen wrote: > On 18 May 2025, at 22:37, Devyn Osborne wrote: > >> Today I received the following message from the mailing list (including >> instructions to reenable, which I did). I don’t understand what caused this >> though… is my Gmail address bouncing messages from the list? > > Yes, the list has been trying to send you emails which have been rejected by > Gmail. According to Google, it's some kind of DKIM related issue. It seems > this happened for all Gmail-users on the mailing list. > >> And/or what can I do to avoid further issues? > > To be honest, I'm not sure. If anything can be changed then it's probably > only me who can do it. > > I have not made any changes on the server recently. I've got DKIM/SPF/DMARC > configured and it appears to have worked for a long time, but I'm really not > an expert on the details. I just know that every few months Google, Apple, or > Microsoft will have some reason to start rejecting all emails from the list. > It's for different reasons and some times I need to use a web-form somewhere > to make it work again. It's impossible to get a human being to actually tell > me what the problem is :) > > It's possible that there's something I could improve/fix at my end (server or > DNS), but I don't really think that these blockages will stop no matter what > I do. > > If possible, just don't use your Gmail/iCloud/Office365 email address when > subscribing to a mailing list.
As someone who runs a large Mailman server as my day job: Benny has to use
Mailman’s DMARC handling. We have opted to use the following setting for most
of our lists:
Privacy options -> Sender filter -> Action to take when anyone posts to the
list from a domain with a DMARC Reject/Quarantine Policy: Wrap message
You could also use "Munge from", but I personally prefer to leave the message
as is.
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.:.Universität zu Köln / Cologne University - ✆ +49-221-470-89578.:.
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