Did you take a look at the headers of one of the E-mails that someone received? Most likely, it wasn't even sent from your server. In most cases, it is extremely difficult or impossible to do anything about this problem (called a "joe job"). Note that it is very difficult for a spammer to forge your IP (difficult enough that they would likely have chosen your IP intentionally, if you got them really upset, for example).
Actually, if you took a look at the URL you displayed above, you would get to http://spews.org/html/S1199.html which shows that those spammers did NOT use your IP at all! They used 209.164.21.122, which is close to your IP. >> Thanks all for the suggestions/comments regarding spammer impersonation. Unfortunately, I don't have any e-mails from this company - but they are listed in many black/spam lists as a spammer. Guess it's quasi "guilt by association" since the IP's are so close together. Not going to post to Google - don't think that would do much good. But will be more aggressive with my ISP (XO) regarding our removal from the blacklist. What is "interesting" is the reported Netblock: 209.164.0.0 - 209.164.63.255. When using the whois at geektools (http://whois.geektools.com/cgi-bin/proxy.cgi), it shows this: Netname: DELTANET-BLK-1 Netblock: 209.164.0.0 - 209.164.63.255 Maintainer: DISI How could they have such a large range of IPs? Any further suggestions welcome! Thanks again, Bruce Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
