TLS error with Thunderbird and att.net mail

artmanphoto · 11 Jan 2022, 03:18 AM

I use the Thunderbird email client version 91.4.1 64 bit on a Windows 10 PC with my att.net mail account. Sometimes I get the following error message when I open Thunderbird and it checks for my email.

"Non-overridable TLS error occurred. Handshake error or probably the TLS version or certificate used by server imap.att.net is incompatible."

It appears to be an "information" message as Thunderbird runs OK.

Does anyone know how to fix this error?

Thanks! Bill

somdcomputerguy · 11 Jan 2022, 10:06 AM

The links on this search results page may help. Note that most of the links are for browser errors, but keep an open mind..
https://duckduckgo.com/?q=Non-overri...alemoon&ia=web

- Bruce

11 Jan 2022, 03:18 AM	#1
artmanphoto Senior Member Join Date: Jan 2010 Location: Kansas City - USA Posts: 177	TLS error with Thunderbird and att.net mail I use the Thunderbird email client version 91.4.1 64 bit on a Windows 10 PC with my att.net mail account. Sometimes I get the following error message when I open Thunderbird and it checks for my email. "Non-overridable TLS error occurred. Handshake error or probably the TLS version or certificate used by server imap.att.net is incompatible." It appears to be an "information" message as Thunderbird runs OK. Does anyone know how to fix this error? Thanks! Bill

11 Jan 2022, 10:06 AM	#2
somdcomputerguy Cornerstone of the Community Join Date: Jun 2004 Location: Rupert, WV Posts: 879	The links on this search results page may help. Note that most of the links are for browser errors, but keep an open mind.. https://duckduckgo.com/?q=Non-overri...alemoon&ia=web - Bruce