[Exim] Columbian Spammer

For the past few weeks every night we are getting thousands of spams
trying to route through one of our mail servers. Here is a sample log
entry

2003-11-03 00:01:27 H=(compaq-1.epm.net.co) [200.116.23.169]
F=<utvegaya@???> rejected RCPT <csevillano@???>:
relay not permitted

Why they bother to continue I do not know as they never get anywhere. I
have complained to abuse@??? and their postmaster but not had any
response.

Where would be the best place to put an acl that would simply disconnect
them every time they tried to connect to our site?

Ron

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Ron McKeating
Senior IT Services Specialist
Internet Services and Software Solutions
Loughborough University
01509 222329