^AMSGID: anything abcd1234
^AMSGID: <id@do.main> abcd1234
Message-ID: <NOMSGID_mimeftnaddr_YYMMDD_HHMMSS_abcd1234@ftn.domain>
Message-ID: <MSGID_mimeanything_abcd1234@ftn.domain>
Message-ID: <id@do.main>