Sendmail Spam Block question.

[Micheal Patterson]

I'm getting numerous spam messages that are coming in with headers such as:

<snip>
Received: from 67.66.xxx.x. ([220.201.80.37])

Where 67.66.xxx.x is the actual Ip of my sendmail server and the actual
sending host is 220.201.80.37. Is there any way to block this type of spam
other than blocking 220.201.80.37? I can't place the ip in the access list
as it kills outbound mail from that system.

Thanks.

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Micheal Patterson
Network Administration
Cancer Care Network
405-917-0600