cannot send mail
All of a sudden, I cannot Send email from one of my two AOL email accounts. I can receive Mail, but not Send. When I try, I get this message: Cannot send message using the server AOL
In Mail Preferences, both accounts are set up identically. In Mail Connection Doctor, there is one AOL SMTP with a green light showing it is connected. In KeyChain Access, there is one SMTP for each account, and they are identical.
I have shut down my iMac, unplugged it, restarted, and still get this message. Any ideas what to do next?
iMac, Mac OS X (10.7)