On 11/3/25 04:18, Stephen J. Turnbull wrote:
Paul via Mailman-users writes:
> Iam getting alot of such from my mail server mail queue lately
> 4d08rT4xMHzMCD6S 2393 Mon Nov 3 01:43:21
> [email protected]
> (host mx-aol.mail.gm0.yahoodns.net[67.195.228.84] said:
> 421 4.7.0 [TSS04] Messages from my-mail-server-IP temporarily
> deferred due to unexpected volume or user complaints - 4.16.55.1
If "my-mail-server-IP" is in fact your mail server's IP, then you may
have a problem: spammers may be using your server as a relay for
spoofed emails.
It is also possible, or even likely that these are the result of bad
actors maliciously requesting subscriptions for 3rd parties. Since this
is a 421 status, these mails should remain queued in your mail server
for a while and can be examined[1]. If this is the case, you may be able
to mitigate this by setting
SHOW_ANONYMOUS_SUBSCRIBE_FORM = False
in your Django settings. See
https://docs.mailman3.org/projects/postorius/en/latest/news.html#news-1-3-9
[1] For example if your MTA is Postfix
postcat /var/spool/deferred/4/4d08rT4xMHzMCD6S
and if that shows a subscription or email verification request
postsuper -d 4d08rT4xMHzMCD6S
to delete it so it isn't retried.
--
Mark Sapiro <[email protected]> The highway is for gamblers,
San Francisco Bay Area, California better use your sense - B. Dylan
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