> > This is arguably another problem with such messages - they should probably
> > go to the envelope return address (from the SMTP MAIL FROM command or the
> > return-path header field) rather than to the author's address (from the
> > From header field).
>
>
> That will get them sent to the mailing list manager, who certainly will not
> care to learn which of the thousands of mailing list members are on vacation
> at any given time.
Actually, these days it's increasingly likely to get sent to a "bounced
message parser" that tries to parse bounced messages and discover which
recipients' addresses are consistently failing. That parser can also be
taught to ignore "out of office autoreplies".
> Of course, the mailing list manager also does not care to learn which
> mailing list members have exhausted their disk quotas either, but hundreds
> of mailservers are very happy to tell him to please send the message again
> later.
When the reporting MTAs use DSN format (and report the proper status codes
for this condition) the bounced mail parser can treat disk quota failures
differently from "no such user" and other more permanent conditions, and
avoid removing list recipients for temporary disk quota failures.
Keith
