Re: Anti-recommendation: Comcast.

["Matthew Gillen" <user=50@nabble.blu.org>]

 Gregory Boyce wrote: 
> On Fri, 18 Jan 2008, Dan Ritter wrote: 
> 
>> This morning I discovered that, in fact, this has been rolled-out across 
>> the country. 
> 
> I'm still able to receive inbound port 25 on my Comcast cable modem.  It 
> sounds like their filtering is growing, but its still not country-wide. 

The story I got when this happened to me a couple weeks ago was that they are 
"detecting" spammers and doing these port blocks automatically (but not 
necessarily for everyone; ie they wait to see if you're actually sending mail). 

I never did find out how they did their detection.  I set up tcpdump on an 
intermediate box and let it run for 2 days to see if I did in fact have a 
virus that was sending spam.  I came up with nothing, which leads me to 
believe that their "spam" detection is really just "outgoing mail" detection. 

Matt 

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