I originally installed Thunderbird about 2 years ago via the package installer on my Linux desktop. Currently running the 68.10 version which has never updated nor is there a function to update the program. I've read through the FAQ's and nothing was helpful. This all came to my attention when I received the following email from my email provider at mail.com a few days ago. "Deactivation of TLS 1.0, TLS 1.1 and unencrypted access We are contacting you because one or more of your devices or programs uses the TLS 1.0 and/or TLS 1.1 encryption protocols to connect to our mail.com email servers, or is using an unencrypted connection. This involves either access via SMTP (sending emails) or retrieval via POP3/IMAP (receiving emails). Unfortunately, the TLS 1.0 and TLS 1.1 encryption protocols are outdated and no longer meet current security standards. To protect your email communications, soon we will no longer allow access to our mail.com servers with these outdated protocols. Unencrypted access will also no longer be possible." They indicated that mail service will stop to my Thnderbird account in a couple weeks if the problem has not been corrected. Thank you for any suggestions about correcting the issue.