Mail app won't reconnect until computer restarted.
I'm using Mavericks 10.9.5 and Mail 7.3.
Recently I got a funny behavior a few times. I occasionally lose my internet connection (supplied via USB). Just a signal loss, as no cables are disconnected. My other apps and mail accounts will disconnect like normal. When I get the connection back, EVERY APP EXCEPT MAIL will reconnect to the internet fine. Mail refuses. I have accounts on multiple services in Mail and all behave the same. I can not "take all accounts online" = nothing. I cannot restart Mail = nothing. I have to restart the entire computer.
Ideas?
MacBook Pro (17-inch Mid 2010), OS X Mavericks (10.9.5)