Wietse Venema skrev den 2020-11-23 17:10:
Postfix 2.6 and later don't add a Message-ID header, unless the message comes from a "local" source. That header is a combination of a time stamp and the Postfix $myhostname value, so it is unique as long as both values are unique.
okay, what if msgid miss the @ charter ?i remember postfix have configs for when @ is not part of msgid it can add @invalid.example.org so its diffrent if not sent local or remote
