Mike Brudenell wrote on 03/06/16 11:22: > *Scenario 1* > Someone here complains that an external recipient hasn't received one of > their emails. To let the downstream postmaster definitively identify the > message in their logs I'd normally supply them with the RFC5322.Message-Id > from our logs.
I give them the answer their systems gave me with "250 Ok" logged with C=...., the envelope addresses used and the exact timestamp when their host took responsibility. According to RFCs there is no guarantee that a message-id exists. And there is at least one common MUA known for ab^H^Hreusing message-ids under certain conditions. Not talking about broken syntax of message-ids. If the envelope got split on your host while delivering to multiple recipients you end up with several messages having the same message-id as well. Greetings, Wolfgang -- Wolfgang Breyha <[email protected]> | http://www.blafasel.at/ Vienna University Computer Center | Austria -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
