Keith Moore <moore@xxxxxxxxxxxxxxxxxxxx> writes:
yes, it's advisory in theory. but in practice Expires in netnews means
"delete the message on or before this date" for very close to 100% of
the servers out there - precisely because in netnews the assumption is
that all messages will expire after a relatively short time anyway.
The part after the dash doesn't imply the part before the dash, and I
think you're underestimating the number of servers that ignore Expires or
set minimum expiration times that disable its effect.