Stan Ryckman <stanr(_at_)sunspot(_dot_)tiac(_dot_)net> writes:
...
A mailing list I own has apparently upgraded, and the "From_"
headers have changed:
An "old" one:
From owner-gs-l(_at_)VM(_dot_)EGE(_dot_)EDU(_dot_)TR Tue Oct 29 20:35:21
1996
A "new" one:
From <@listserv.gmd.de:owner-gs-l(_at_)VM(_dot_)EGE(_dot_)EDU(_dot_)TR> Sun
Nov 17 18:52:12 1996
The two "@" signs in the "new" version disturb me, because they
could mess up parsing. Are they "legal"?
Yes. That's a route address, see rfc822. Do note, however, that they
_are_ deprecated. To quote rfc1123 section 5.2.6:
A Sender-SMTP SHOULD NOT send a RCPT TO: command containing an
explicit source route using the "@...:" address form. Thus,
the relay function defined in section 3.6 of RFC-821 should
not be used.
If this is due to a software upgrade, then the maintainer should be
yelled at for changing working software to be only "conditionally
compliant" by not following the SHOULD.
Philip Guenther