![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
Comcast Blacklist
Aug. 21st, 2006 07:54 amIn the last week I have been put on Comcast's blacklist 3 times. for sending spam... Spam you say? not hugme!!
No, I have not been sending spam.. What is happening is that the comcast blacklist not reading it's mail headers correctly, When an e-mail is generated it contains several things, one of them is information about the computer which generated the e-mail, and then each time it's passed to another computer and forwarded along that system will attach more information to the header record. My server rarely generates e-mail itself, mostly just log files. It does however forward a LOT of e-mail, ten to twenty thousand per day sending them to the user they are supposed to go to. Each time I forward an e-mail I attach to the header the information saying that I have forwarded it.
Comcast gets an email for a user, lets say a piece of spam, it reads the header and is supposed to add the IP address for the system that generated the e-mail to it's blacklist... but instead it takes EVERY ip and adds it to the blacklist, including any system that acted as a forwarding agent. Which in this case is me.
now if you read any of the big internet blacklists my IP doesn't show up. Why? because these lists work, they understand the difference between a system that generated an email and a system that forwards an e-mail.
if you want you can check for yourself... this is a good site: http://www.mxtoolbox.com/blacklists.aspx
type in my IP 208.32.175.113
you will see 6 in red, I am on those blacklists the first is BLARSBL I don't know whyt his one is even listed... this guy blacklists everybody then puts in this blurb (coppied directly off of his website): "If you would like a site be added or removed from BlarsBL, you may hire Blars at his normal consulting rates (currently $250/hour, 2 hour minimum, $1000 deposit due in advance for non-established customers)"
the other 5 blacklists I am on are out in russia... not quite sure why I am on those, nor do I care.
then the ones in green (about 80 of them) are the ones I am ok on...
this is the first thing I checked, if you start showing up on these then chances are you are either actually sending spam or your system has been compromised, I got a number for them today (used a trick to get their system to give me a number for their abuse department) and I am going to call them and see if I can get their system fixed. if not, my company IS going to be losing business because of this and since I AM a comcast customer... well... it's possible a lawyer is going to be the next person I talk to.
No, I have not been sending spam.. What is happening is that the comcast blacklist not reading it's mail headers correctly, When an e-mail is generated it contains several things, one of them is information about the computer which generated the e-mail, and then each time it's passed to another computer and forwarded along that system will attach more information to the header record. My server rarely generates e-mail itself, mostly just log files. It does however forward a LOT of e-mail, ten to twenty thousand per day sending them to the user they are supposed to go to. Each time I forward an e-mail I attach to the header the information saying that I have forwarded it.
Comcast gets an email for a user, lets say a piece of spam, it reads the header and is supposed to add the IP address for the system that generated the e-mail to it's blacklist... but instead it takes EVERY ip and adds it to the blacklist, including any system that acted as a forwarding agent. Which in this case is me.
now if you read any of the big internet blacklists my IP doesn't show up. Why? because these lists work, they understand the difference between a system that generated an email and a system that forwards an e-mail.
if you want you can check for yourself... this is a good site: http://www.mxtoolbox.com/blacklists.aspx
type in my IP 208.32.175.113
you will see 6 in red, I am on those blacklists the first is BLARSBL I don't know whyt his one is even listed... this guy blacklists everybody then puts in this blurb (coppied directly off of his website): "If you would like a site be added or removed from BlarsBL, you may hire Blars at his normal consulting rates (currently $250/hour, 2 hour minimum, $1000 deposit due in advance for non-established customers)"
the other 5 blacklists I am on are out in russia... not quite sure why I am on those, nor do I care.
then the ones in green (about 80 of them) are the ones I am ok on...
this is the first thing I checked, if you start showing up on these then chances are you are either actually sending spam or your system has been compromised, I got a number for them today (used a trick to get their system to give me a number for their abuse department) and I am going to call them and see if I can get their system fixed. if not, my company IS going to be losing business because of this and since I AM a comcast customer... well... it's possible a lawyer is going to be the next person I talk to.
