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[Matthew Dillon]

    Ok, what I did was modify my milter filter to reject mail from
    non-local sources sent to crater but containing a From: header
    containing crater's domain name.

    That should put a stop to the spam.  Basically the spammer is sending
    mail to crater's bestserv list using a From: address of
    <user>@crater.dragonflybsd.org.  I looked through the logs and there
    are thousands of such spams, the random user generator the spammers
    use just randomly found one that is actually subscribed to our
    commits list.

    Sendmail does not have any sort of map file or filter that is
    conditional on the connection coming from OUTSIDE the machine
    that I can use to filter out From: headers that specify
    crater.dragonflybsd.org.  It just has an overall filter that
    catches both local and remote sent email.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>