Scenario: I've been using Thunderbird for years now to connect to Verizon and download my email. Server settings have always been:
POP3
incoming.verizon.net port 110
connection security none
authentication method encrypted password
SMTP
outgoing.verizon.net port 25
connection security none
authentication method password, transmitted insecurely (oops)
Suddenly when I try to get my email, it stops and tells me there's an authentication failure. I've seen this happen before with Verizon when a server is down or messed up or whatever (pretty poor message for a service interruption, but whatev). So I decided to wait it out, but when it didn't clear up after several hours, went to the website where I was able to log in (huh?) and decided to change my password for the hell of it. Guess what? New password doesn't work in the email client. Quelle surprise.
Sooo, I find THIS page (https://www22.verizon.com/Support/Residential/internet/highspeed/email/setup+and+use/questionsone/86782.htm#) which tells me a lot of malarkey about server settings. I tried changing the incoming to their recommended settings, and it looks like there's no server communications a-tall.
Can someone tell me what's amiss, and while you're at it, tell me where in a just and well-ordered universe a service provider changes server settings without notifying users well in advance? Extra points for creativity.