Q: Mail error message

I keep getting this error message in Mail.

The server returned the error: Connections to the server “p50-imap.mail.me.com” on the default ports timed out.

I cannot find the problem.  I've logged out of iCloud and logged back in, still the problem.  I haven't changed any settings.  If I Quit Mail and re-open it all of the deleted email messages reappear.

Ideas?