[cobalt-users] RaQXTR - Help! Being spammed into next week

["Tim Skipper" <mailinglists@xxxxxxxxxxxxxxxxxxxxxxxx>]

One of the domains on my XTR is being spammed into oblivion - it brought
the whole server down about 2am this morning.  I've now removed the
catchall address for the domain in question so none of the mail is being
stored now, but obviously it's still hammering the CPU and my bandwidth.

The maillog just shows "...no such user here" for 99.9% of the mail,
unless they hit a live account.  It's being going literally continuously
with thousands and thousands of mails being sent for well over 24 hours
now.

Is there anything I can do, short of switching mail off at server level
(not an option with so many paying customers and other domains on it) to
minimise the impact?

Cheers,
Tim Skipper