But in many cases the owner was unaware of their wifi being used by others. Let's go over it again. WEP, MAC filters or less security is "no security."
Have had Comcast Internet access for about 8 months. No recent changes in my operating profile/activities.
Got a email on July 4th stating Comcast had detected suspicious activity from my email account - so Comcast disabled port 25. Comcast gave me no warning, they just made this change. I was instructed to define another port for sending / receiving emails.
I am surprised/ disappointed that Comcast would change my account without first contacting me. I occasionally send/receive emails with video clips (about 3 MB) in size. And on average, send/receive about 50 emails per day. Comcast said this matched the profile of a spammer. That I could have a virus on my computer that is doing illegal activity.
I know Comcast monitors downloads, especially for movies, and will slow down your access speed. And for repeat offenders, even end their service contract. But I had not heard that Comcast was monitoring email activity.
I use the McAfee software Comcast provides to have security and do a weekly virus scan. What Comcast has told me to do to reset my computer has not worked. Spent 3 hours today with their HelpDesk and I'm still unable to use my machine. Never had a problem BEFORE Comcast disable port 25.
Comcast now wants "full access to my computer - to fix my problem". I did not have any problems BEFORE Comcast touched things so I do not think I should trust them.
BUT has anyone else heard of ISPs disabling email accounts like this?

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