Blacklisted for spam

My cable IP address (dynamic with Comcast.net) has been blacklisted and I can no longer send email (work-related, not Comcast) directly to my work email server as I used to. I have to get off the blacklist so am trying to fix any possible holes (I'm not a spammer).

I've scanned the PC laptop that is also connected to my home LAN and it's clean. I've encrypted the wireless at 128-bit but it used to be open - I thought the signal was weak and I have no close neighbors so I thought there'd be no problems! Recently I saw some odd MAC addresses on the wireless so shut it down.

The only thing left that I can think of is my mac. Are there any viruses, spyware, etc. that could be a problem, and if so, how can I check and get rid of them? I've always assumed there aren't any problem viruses or spyware for macs, but maybe I'm wrong...

Thanks,
Carl

Powerbook Pismo (G3 400), Mac OS X (10.3.9)

Posted on Jan 6, 2006 2:52 PM

Jan 7, 2006 1:22 PM in response to JulieJulieJulie

Oh, by the way, the problem isn't generally an open relay on home IP addresses like mine, so be sure to check the other links on ORDB.org. The problem is more that the IP can be hijacked to send mail directly to closed mail servers - at least until the address get's blacklisted as mine did. But by then much of the spam damage has already been done.

Comcast is blacklisted in bulk by SPEWS, SORBS, FIVETEN and others because so many of their home users don't secure their home networks against this kind of problem, and Comcast refuses to do anything about it. Anyway, I've learned a lot over the last day. Thanks to all for the help.

Carl