I have several email accounts that I access through Thunderbird but as of this morning when an update happened 2 of my accounts still work but 2 of them give me a "login to server (my server) failed". Last night they all worked an this morning they don't. both that don't work are on the same server. 2 Gmail and 1 comcast.net accounts are working fine, but the other two are not. My passwords have not changed nor has the server info changed. Only change is the Thunderbird update that loaded this morning.