Mail Not Sending; Recreate Account?

Comcast sent me an e-mail saying they had blocked the sending of email on port 25 (I was actually using 995), and that I should change my settings to send email on port 587. True, I could not send, but I could receive. When I switched to 587 (with password authentication and no SSL) I still could not send, and now get an alert saying "The connection to the server 'mail.comcast.net' on port 587 timed out." Note that it mentions the Incoming server as the problem, and not the Outgoing server, which is set to smtp.comcast.net. Now Comcast advises me to re-create the account. Is this the right thing to do, and how do I re-create an account without losing everything in mailboxes? Thanks.

Comcast sent me an e-mail saying they had blocked the sending of email on port 25 (I was actually using 995)
No, Port 995 is a receiving port, not a sending port.
Now Comcast advises me to re-create the account.
Do this:
1. Quit Mail if it's running.
2. Go to ~/Library/Preferences and delete the com.apple.mail.plist file.
3. Restart Mail, setup your account(s) again and wait for Mail to find your existing mailboxes. Then check to see if the problem persists.
Mulder

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