Spammers Recognize it...

Try this, or equivalent, on your favorite MTA:

define(`confSMTP_LOGIN_MSG', `$j spamd IP-based SPAM blocker; $d')dnl


I've noticed increasing numbers of "Client Didn't Say HELO" disconnects when using this, although not conclusive...

If they're watching for the spamd banner, maybe it should change when blacklisting...

220 spamd.srv.ualberta.ca Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at  Fri, 08 May 2005 14:32:43 -0600