Should I take this to mean that I have a compromised machine, or are they just doing their thing.

Quote:
Dear Comcast High-Speed Internet Subscriber:

Action Taken: In an effort to help prevent spam and ensure the security of our network and customers, Comcast has modified your modem’s settings to prevent the sending of email on port 25. That is the default port email programs such as Outlook Express use to send email. We’ve taken this action because we may have detected virus-like activity from your modem or received reports from other email providers that mail from your modem generated complaints from their users. Please read this message to understand how this action may impact your ability to send email and what you should do next.

Comcast Webmail Users
If you use a web browser to access your Comcast.net email, this action will not affect your ability to send or receive e-mail. This action also does not affect any non-Comcast webmail services.

Email Program Users (Outlook Express, Outlook, MacMail, etc.)
If you use an email program, this action will disable your program’s ability to send email until you change your email program settings to send email on port 587. Port 587 uses authentication and is an industry-recommended alternative to port 25. If you use Outlook Express and Comcast.net email, Comcast has provided a simple one click fix for you to use with Internet Explorer. If you use another email program such as MacMail, Eudora, or Thunderbird, please visit our client page for information on how to change the settings for sending email in your email program.

If you are not using Comcast.net email and use another email provider, please contact your provider for its recommended port settings. Most email providers offer an alternative to port 25 for sending email.

All Users

To help protect your security and privacy, it is important to regularly check for and remove any possible viruses from your computer. You can do this using the McAfee Antivirus and Firewall software available from Comcast to subscribers at no additional charge or by using other popular antivirus solutions that are widely available. In addition, Comcast recommends that you secure any wireless network in the home and that the operating systems on your computers be updated regularly with the latest security enhancements. Please visit the Comcast.net security channel for more information and tips on how to enjoy a safe and secure online experience.

If you have additional questions please visit (www.comcast.net/help).

Thank you for choosing Comcast!

Sincerely,
Comcast Customer Security Assurance

_________________________
Glenn