Can not send messages messages from Thnderbird. Getting Failed connection to server error messages. So, I confirmed that the user id and password entered is correct. I contacted email provider and updated incoming and outgoing server settings to IMAP settings and confirmed they are correct. I manually updated Account Configurations per the Thunderbird website. The server settings entered are confirmed correct when I re-test. When I select Done I still get the error "Unable to login at server. Probably wrong configuration, user name or password." I have confirmed that all of those elements are correct. What now? Email provider is Spectrum. Incoming Server type- POP mail server - can't change server type or won't get incoming mail Server name- pop.charter.net port 110 Outgoing - changed to IMAP - per provider advice Server name - mobile.charter.net port 587 Connection security - SSL/TSL