[Exim] no IP address found for host

My mail log has 482 entires like this since last week:

Aug 8 10:04:08 vife exim: 2003-08-08 10:04:08 no IP address found for host
link.dsl.xmission.com

Checking xmission.com for a web page reveals antispam software, so I assume it's
an attempt by a spammer to advertise his anti-spam software. I'd just block him at
the firewall, but the error message doesn't include any ip number for the original
connection. Is it possible to get the IP in the logged message? How?


Rossz