non-existent msgids & duplicate delivery suppression

David Carter dpc22 at
Fri Jun 27 09:27:59 EDT 2003

On Fri, 27 Jun 2003, Stephen Grier wrote:

> I have noticed that this has been happening on other occasions, where
> lmtpd does a duplicate_check and then a duplicate_mark on zero length
> message-ids. This raises the possibility that the server is suppressing
> messages that are not duplicates, but merely have no message-id header.
> Has anyone else seen this happening?. If this continues to happen we may
> have to disable duplicate delivery suppression.

This seems quite likely. If a message doesn't contain a Message-ID, your
mail system should really add one before it passes it on to Cyrus.

Exim does this automatically. I don't know about other MTAs.

David Carter                             Email: David.Carter at
University Computing Service,            Phone: (01223) 334502
New Museums Site, Pembroke Street,       Fax:   (01223) 334679
Cambridge UK. CB2 3QH.

More information about the Info-cyrus mailing list