Cannot send mail error

All of a sudden I keep getting CANNOT SEND MAIL message. The connection to the smtp.comcast.net server has failed.
I've re-entered the parameters, deleted and re-added the email account, added another server account...nothing works. I can't send mail.

AlexMaeda,
This article has more information:
http://docs.info.apple.com/article.html?artnum=305634
As for an email provider allowing customers to relay outside of their network, many email providers, set up an authenticating SMTP server on different port. The article above includes information on specifying the port to use.
For example, .Mac accounts can use port 587 as discussed in this article:
http://docs.info.apple.com/article.html?artnum=75124
You may want to check with your email provider if they offer an authenticating smtp server for people who are traveling or using mobile devices. Many do so without any additional cost, some may charge for access to that service.
Hope this helps,
Nathan C.

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