[MlMt] List membership disabled -- excessive bounces?

[Benny Kjær Nielsen]

On 19 May 2025, at 11:12, Sebastian Hagedorn wrote:

> On 19 May 2025, at 11:02, Benny Kjær Nielsen wrote:
>
>> On 19 May 2025, at 10:52, Sebastian Hagedorn wrote:
>>
>> As someone who runs a large Mailman server as my day job: Benny has 
>> to use Mailman’s DMARC handling.
>>
>> I already do that, but it's possible this issue is related. The error 
>> messages were about DKIM failing.
>
> OK, in that case I guess the DNS lookup failed. I’ve seen that 
> happen in the past. When Mailman can’t lookup the DMARC policy, the 
> DMARC handling doesn’t happen, leading to this issue.

That seems to indicate that even with wrapping then this would have 
failed (because that would also not have been done). Meaning that I 
would have to either munge all or wrap all emails.

In any case, the sender of the email triggering the issue often sends 
emails to the mailing list (without munging).

Here's an example of the error message:

	<xxx at gmail.com>: host alt1.gmail-smtp-in.l.google.com[209.85.202.27]
     said: 421-4.7.30 Your email has been rate limited because DKIM
     authentication didn't 421-4.7.30 pass for this message. Gmail 
requires all
     bulk email senders to 421-4.7.30 authenticate with DKIM. 421-4.7.30
     421-4.7.30  Authentication results: 421-4.7.30  DKIM = did not pass
     421-4.7.30  To set up DKIM for your sending domains, visit 
421-4.7.30
     https://support.google.com/a?p=turn-on-dkim  421-4.7.30 To learn 
more about
     Gmail requirements for bulk senders, visit 421 4.7.30
     https://support.google.com/a?p=sender-guidelines.
     ffacd0b85a97d-3a35ca8c295si4754581f8f.772 - gsmtp (in reply to end 
of DATA
     command)

I'm not sure if this indicates that all senders on the mailing list have 
to have DKIM configured for their domains now? This is not the case for 
the From address involved.

-- 
Benny
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