[Bug 251327] mail/thunderbird fails to connect over ssl/tls

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251327

--- Comment #4 from Andriy Gapon <avg at FreeBSD.org> ---
I think that the new thunderbird doesn't prompt (at least in some cases) for
security exceptions if it does not like a certificate for some reason (e.g.,
self signed).  I had to an exception manually though the settings.
A couple of links to save you some time:
https://manuals.gfi.com/en/kerio/connect/content/server-configuration/ssl-certificates/self-signed-certificates-in-mozilla-thunderbird-950.html
https://stackoverflow.com/questions/63947262/thunderbird-78-how-to-add-security-exception

Also, new thunderbird has some older TLS versions disabled by default.
Your problem could be related to that as well.

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