[MM3-users] Reject email based on message size.

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?

Regards, Hitachi.