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 <wbreyha@???> |
http://www.blafasel.at/
Vienna University Computer Center | Austria
