well, they just did it to me! they are now blocking port 25! i called and complained and they say - that they saw 5,000 emails or more come from my cable modem on a single day. so they are preventing that port now - and will not fix it. i know my system isn't sending that - i have no windows boxes, and the majority of my traffic is sent via a VPN. i did however download about 500gb of corp data to my fileserver ( i work for red hat - need to synchronize all the software, etc) - and i'm sure that is what they flagged me - a large amount of data over a short amount of time. i had been happy with comcast but this is not cool. it also seems that they have reduced my upload speed from 4mb to 1.5mb ... but i'll have to do some more testing to verify. might be time to increase my DSL circuit. i have always had a slow 1.5mb DSL line as a backup, since my wife and i both work from home, and both our jobs rely on internet connectivity, i felt it worth the extra $20 a month for a slow backup line. it actually comes in handy about 3-4 times a year, as my comcast line will go down for 1-3 days a couple of times during the year ... usually due to the local neighbourhood comcast visit that screws up something for the entire neighbourhood until i call and complain - like this weekend! might also have to look at the business comacast offering - faster and supposedly no limits or restrictions. anybody have that? i live in burnsville so any feed back regarding the comcast business offering would be useful. thanks!