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Comcast Seems Clueless About Blacklists

By Ed Foster, Section Gripes
Posted on Mon May 31, 2004 at 12:02:15 AM PDT

An increasingly common experience is to discover that some of your e-mail is being blocked because your ISP has you sharing a server with a blacklisted spammer. What can make it all the more frustrating is when the ISP wont do anything about it, as in the recent experience of one Comcast cable modem customer.


"Sites such as SpamCop have arisen to address the fact that many ISP's are happy to ignore spammers operating out of their networks as long as they can keep on adding paying customers," the reader wrote. "Recently, my Comcast server has been blacklisted by SpamCop and important e-mail is not being delivered to some of my clients. This is a continuing problem with Comcast, and -- as evidenced by the number of complaints on the Comcast help forums -- Comcast seems to have no interest in addressing the problem."

Since several ISPs were blocking his e-mail to their customers as a result of the SpamCop listing, the reader messaged Comcast in the hopes they would take appropriate action to remove the sources of spam from their server. Instead the helpful folks at Comcast replied:

"Thank you for contacting us regarding your Comcast High Speed Internet service. We're sorry but as the SpamCop server/service is the one that is blocking, you will need to contact SpamCop with your request."

Of course, Comcasts reply struck the reader as being either disingenuous or downright stupid. "Obviously, SpamCop is not going to listen to me," he noted. "Even if they did, if the source of spam is not dealt with, the Comcast mail server will just be listed again in a heartbeat. The only effective approach would be for Comcast to approach the major ISPs blocking servers on the SpamCop list and to convince them to stop blocking e-mail originating at Comcast. It would also be helpful if Comcast then identified the offending computer(s) and shut down the spam at the source."

< Used News: RIAA Conscripts Feds, Microsoft Passes the Buck and Comcast Cleans up their Act | Reader Voices: Terms of Abuse >


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Comcast Seems Clueless About Blacklists | 88 comments (88 topical) | Post A Comment
Spam blockers[ Reply to This ] (none / 0) (#1)
by Bryan Bytehead on Mon May 31, 2004 at 04:02:47 AM PDT

What can make it all the more frustrating is when the ISP won't do anything about it, as in the recent experience of one Comcast cable modem customer.

I recently found out that my personal site's mail server was blocking my Comcast email (a pain to send yourself a snippet of something if you don't remember that), and was also blocking the mail server of my shell account (core.com). The service blocking the email in this case is sorbs.org.

I wrote to both support emails of both ISPs, and got the same result. They both were not willing to pay the $50 that it would cost to get themselves unblocked. I was urged by both to get the other ISP to change spam blockers. Which I do not consider to be unreasonable, as within 10 minutes of being unblocked, they could be blocked again. Both cases are about some spam catching address, and in both, it had been almost two years since such an address was used.

Of course, one of the issues that I have with such things is that with news.admin.net-abuse.sightings, once you get hit with one spam, you're going to get flooded, as the postings of spam messages include the entire contents of the To: and CC: lines, and you can bet that the spammers are trolling that for new addresses.

Spam is getting to be a big problem. Over half and approaching 2/3s of my incoming email is spam, and that's excluding my shell account which gets over 100 messages a day of nothing but spam, my junk hotmail account, and my other two useful hotmail accounts. And the account that is covered under a spam blocker, still gets spam on a regular basis.

I don't know the answer to this problem. I think anonymity is good, but that leaves it wide open for spam. Maybe we need a challenge/response system for truly anonymous mail, and then authenticate the hell out of the rest. Don't want to receive any anonymous email, just dump it.

[ Reply to This ]



Effective laws with teeth[ Parent | Reply to This ] (none / 0) (#2)
by tscoff on Mon May 31, 2004 at 04:59:48 AM PDT

What we need in order to stop the influx of spam is for the United States government to pass effective laws against spam with real penalties when you're convicted.  Start throwing the spammers and their customers in jail and leaving them there for 10 years.  Before long there won't be many spammers left because there aren't that many of them and most of them reside in the USA and their names and addresses are known to the anti-spam activists who can't do anything with that information.

[ Parent | Reply to This ]


yes[ Parent | Reply to This ] (none / 0) (#49)
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More info?[ Reply to This ] (none / 0) (#3)
by Anonymous User on Mon May 31, 2004 at 10:24:44 AM PDT

Need as little more info here. Is this the case of a co-located server? Or do you have a "business" account with Comcast, that allows a SMTP server to operate off of the connection? Or, perhaps, you have a regular consumer account-- and have found that the IP address you get is in a block of dynamic addresses often blocked by many blacklists?

[ Reply to This ]


Comcast hosts many zombie spammers[ Reply to This ] (none / 0) (#4)
by Anonymous User on Mon May 31, 2004 at 01:45:34 PM PDT

Declan McCullagh on News.com has a story quoting a Comcast engineer who admits that Comcast is one of the biggest spammers on the 'net due to the number of zombies spewing spam without the owners even being aware of it. <http://news.com.com/2010-1034-5218178.html?tag=nefd.acpro> This is probably why your Comcast mail is being blocked. The blocking ISPs and companies intend to pressure Comcast. Whether or not that will have the desired effect is certainly questionable.

[ Reply to This ]


Do blacklists even make sense?[ Reply to This ] (none / 0) (#5)
by wantobe on Tue Jun 01, 2004 at 03:11:36 AM PDT

Fred Langa makes a pretty good case (and has been for a few years now) that the real problem is "woefully obsolete ... crude, sloppy, outmoded approach to spam control that often ends up doing far, far more harm than good."

In the latest LangList newsletter, he reports how the Kennedy Space Center got blacklisted, though not by SpamCop. Is it time for ISPs to stop using these blockers and look to more efficient, and fair, means to thwart spam?

Obviously many of you think the blacklisters aren't the problem and that the blocked ISPs should address the issue. There's some truth to both sides, but innocent users who don't have many choices internet service are hurt more by SpamCop and their ilk's wide-ranging blocking than are hurt by spam.


Rob Miles
--
There are 10 kinds of people in the world; those who understand binary and those who don't.
[ Reply to This ]



Blocking Lusers' Port 25[ Reply to This ] (none / 0) (#6)
by trashpicker on Tue Jun 01, 2004 at 07:01:16 AM PDT

In the aforementioned Declan McCullagh article on Cnet, he discusses how Comcast plans to identify zombie machines and reconfigure them to block port 25. the thought being that "zombie-infected users won't even notice", and blocking the port will stem the flood of spam from the machine. (bottom of article)

[ Reply to This ]


yes[ Parent | Reply to This ] (none / 0) (#50)
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[ Parent | Reply to This ]


Vote with your pocketbook[ Reply to This ] (none / 0) (#7)
by Anonymous User on Tue Jun 01, 2004 at 11:17:44 PM PDT

A simple response to unresponsive ISPs - Vote with your dollars (or pounds, yen, euros, etc).

According to SpamHaus.Org the vast majority of spam comes from around 200 people. These cannot equal the revenues acheived by an ISPs consumer base.

It has been said that it costs about 5 times as much to gain a new customer than to keep an existing one. Pain to the bottom line will ulimately guide any ISP to the correct conclusion.

[ Reply to This ]



Sounds good?[ Parent | Reply to This ] (none / 0) (#8)
by Mason on Wed Jun 02, 2004 at 06:42:04 AM PDT

I'd love to vote with my dollars!  Unfortunately, I just moved to a Comcast area, and unless I want to pay for a T1, Comcast is my only realistic option for high speed internet.

Blah.

[ Parent | Reply to This ]



yes[ Parent | Reply to This ] (none / 0) (#51)
by maderikapapa on Fri Jun 27, 2008 at 08:32:47 PM PDT

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