On Tue, Dec 16, 2025 at 7:32 AM Hitashi mancho via Mailman-users <
[email protected]> wrote:

> Dear all,
>
> We have a few mailing lists with a message size limit of 512K. At the same
> time, these mailing lists are moderated by designated moderators.
> As configured, posts with a message size greater than 512K are held for
> moderation. However, even after multiple reminders, some moderators accept
> these postings.
>
> Is there a way to automatically reject all such messages with an
> appropriate rejection reason?
> Can we implement a custom rule or a plugin that will help in this case?
>

The best place to achieve that is at the MTA level.

However, for completeness, you can also check the various config options
available for Mailman core:
https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/config/schema.cfg


-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
 In an Internet failure case, the #1 suspect is a constant: DNS.
"Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)
[How to ask smart questions:
http://www.catb.org/~esr/faqs/smart-questions.html]
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