Hey,
there is a function notify_quarantined_recipients.py - that works well to inform if incoming email has been added to quarantine.

But we have now a issue, that if sent email contains banned attachments (mp3, e.g.), then it is added to quarantine, but user doesn't know that.

Is there any way to notify user of emails that cannot be sent?

Thank you!

(user = internal user, iredmail user. not external sender).