Rejecting mail to invalid username immediately

[Vance Haemmerle]

I'm using MX 4.2 with the latest modifications
(all patches and relay reject mods). I'm noticing
lately that I'm getting a lot of SPAM to my system
addressed to invalid usernames, specific ones. These
end up clogging my QUEUE, I've seen about 300 of them
at times. I'm wondering if there is a way to have
them instantly rejected rather than hanging around for
several days until the max retries are used without
affecting the settings for other mail delivery. Any
suggestions? I'm wondering why an invalid address
doesn't caues an immediate bounce. Could I do an
address re-write rule for these usernames that would
set the address to an invalid RFC 821 address?

Thanks,
Vance

[Phillip Helbig---remove CLOTHES to reply]

In article <K%4Lg.15388$%j7....@newssvr29.news.prodigy.net>, Vance
Haemmerle <va...@toyvax.Glendale.CA.US> writes:

I don't know about MX, but in standard HP TCPIP, as of version 5.4 you
can have this in TCPIP$SMTP_COMMON:SMTP.CONFIG:

Symbiont-Checks-Deliverability: FALSE

the default being true. This will immediately reject mail to valid VMS
usernames which cannot receive mail on your system (i.e. no account, no
forward, no logical name etc). It will reject it at the dialog level,
i.e. it will NOT generate a boune message. Bug: if the name is not a
valid VMS username, e.g. if it is longer than 12 characters, it will
generate a rejection message.