Paul M Foster wrote:
Regarding the rejection of dynamic IPs by smarthosts, are you saying that it's a "blacklist" of sorts that lets them know an IP is dynamic? (Serious question. I don't know the mechanism by which they determine what is and isn't a dynamic IP.)
I run my own mail server and use the zen blocklist from spamhaus.org. The zen list combines all the the anti spam lists plus all IPs designated to end users (http://www.spamhaus.org/zen/)
The reason for blocking end users is that a lot of SPAM is sent out by compromised machines from some home Internet connection. I am currently getting about 5 connections every 2 seconds from compromised computers attempting to spam my server. The origin is usually a dynamically assigned IP from Sprint or Comcast (USA ISPs). So blocking the end users from sending SPAM tends to cut down on a LOT of junk.
Here is a bit more info about the end user blocklist. http://www.spamhaus.org/pbl/ -- John Question / Answer based CAPTCHA http://www.network-technologies.org/tiny.php?id=1 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
