I have an SBS 2K3 Premium server. It works great with no issues other than this black list problem. About two weeks ago I started getting delay notices from the server saying that some messages hadn't gone through. After checking my server black list status I realized it had been added to one list @ http://www.spamcannibal.org
. Funny thing is though it says its listed due to invalid PTR record..
My static IP address is 18.104.22.168. I've contacted Windstream to try and update our PTR record but I'm not sure I'm doing it correctly. Please note that our incoming email goes through Trend Micro's Hosted SPAM service before arriving at our server. I only have issues sending to certain addresses. Right now its Bellsouth addresses. My actual mail domain is mail.dmxm.biz.
I've also tweaked the IMF on my server to make sure we weren't sending out Spoofed NDR's.
Thanks in advance.