Recently getting message "Connection to the server "imap.comcast.net" on the default ports timed out"...solution?

I've recently starting getting the above message on my desktop email.  All the settings seem correct (IMAP port 993 with SSL/TLS, SMTP with port 587 with SSL/TLS).  This is frustrating and I'm wondering if anyone has a solution.  I've tried using Xfinity Assist, which has been useless.