I just installed updated to 115.14.0 for my OS 10.13.6. I had a very old version of Thunderbird 45... I went through the gmail sign on procedure and it looked like it was successful but I can't download or send any messages. I have verified incoming and outgoing server settings on Gmail. Any insight would be great! When I try to download messages I get a message that it can't connect or that it times out. When I send messages: Sending of the message failed. "The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com timed out. Try again." incoming server settings: imap.gmail.com and I have tried pop.gmail.com (Profile currently shows Pop mail server but I have it set to imap.) SSL/TLS I have tried ports 993 and 995 Auth: OAuth2 Outgoing server settings: Smtp.gmail.com Port: 465 Auth: OAuth2