To click or not to click?

[i'm lost]

I'm guessing the one-click fix link requires an ActiveX plugin in IE to work. If you can still send email through an email client, then there's no reason to acknowledge the message. If not, it can't hurt to view the the page with instructions for changing the port that you use. If you're really paranoid about clicking on it still, doing it under a non-administrator account, and maybe with something like NoScript for Firefox, should prevent the page from automatically doing anything bad.

For what it's worth, comcastsupport.com appears to redirect to help.comcast.net.