Then on Wednesday, August 6, 2008, things went bad.
Sending email was a major problem. For no particular reason, I send email via my GoDaddy account. This has worked without a problem for over 2 years. At first, I assumed that GoDaddy was the problem ... I even sent them an email describing the problem once I was sure that the connection had been down for over 1 hour. However, after the connection had been down for over 10 hours, I tried to see if something else was wrong.
It turned out that Comcast blocked the standard SMTP port - port 25.
Repeated attempts to find useful information on the Comcast site was a complete waste of time. Many pages actually required me to update my browser before I could read their "help". (I never update working software ... there are many reasons for this.)
According to the excelent GoDaddy notes, some ISP's block port 25 and either 80 or 3535 can be used. They even supply specific instructions on how to change the port in several email clients.
Tools / Account Settings...
Outgoing Server (SMTP)
This data is stored in
C:\Documents and Settings\[Username]\Application Data\Thunderbird \Profiles\5o9vtxzv.default\prefs.js