SA checking A records for local host names

[Ben Wylie <sa...@benwylie.co.uk>]

I was very original when naming my server and called it ... server.
When an email comes into my server it comes to the computer called server
and goes through an antivirus gateway. This adds the following header:

Received: from cm218-254-253-168.hkcable.com.hk ([218.254.253.168])
 by server. (NAVGW 2.5.2.12) with SMTP id M2005052513231927896
 for <bl...@mydomain.tld>; Wed, 25 May 2005 13:23:28 +0100

Spam assassin seems to be looking up A records for server. How do I tell it
that server is a local name, and not a domain name. For some reason it is
finding the ip 194.168.4.220 for server.

debug: looking up A records for 'server.'
debug: A records for 'server.': 194.168.4.220
debug: received-header: 'by' server. has public IP 194.168.4.220

Thanks
Ben