Suddenly can't send mail with Comcast.

Just thought I'd add my experience to the chorus. Use Mail on a G4 PB running latest version of Tiger with Comcast as ISP. Few days ago kept getting the message that port 25 timed out. I questioned Comcast, and got a standard reply to try port 587, which I did, and which works. I can now send mail through port 587.
Question though: Is this a Comcast problem, or an Apple Mail problem. It seems like it cannot be a coincidence that "can't send mail" seems to be a hot topic all of a sudden, and that it involves various ISP's and platforms. I haven't heard the word "virus" mentioned.

In my mind, it's a silly attempt by ISPs to limit/cut off SPAM, not that that is a silly idea in and of itself, but changing the Port number isn't going to last very long, add to that not notifying Users/Paying customers before hand is negligent if not criminal!
The Spammers probably knew and adjusted to the change before the first Customer figured it out.

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