christ1 said

https://lists.exim.org/lurker/message/20141017.093614.e5c38176.en.html

Thank you, if I put " openssl_options = +no_sslv2 +no_sslv3" is not recognized by exim, if I put "tls_require_ciphers = NORMAL:!VERS-SSL3.0" Thunderbird is unable to send message also Outlook with this so is better mine line where alow TLSv1.1

I found also other articles like here: http://www.systemajik.com/blog/disabling-sslv3/

But also with "tls_require_ciphers = SECURE128:-VERS-SSL3.0" Thunderbird are unable to send message.

Seems Thunderbird are unable to use TLS. I don't know.

I think you need to troubleshoot your Exim setup. Thunderbird works fine with TLS. Good luck.

christ1 said

I think you need to troubleshoot your Exim setup. Thunderbird works fine with TLS. Good luck.

I think if is not an issue with Thunderbird a new install should not be affected from any problem.

Maybe you say Thunderbird work well with TLS so I AM unable to understand if is only my Exim issue why TypeApp on Android and Outlook work fine.

This let me think Thunderbird is unable to comunicate in secure mode with my server as I have keept enabled in Exim ONLY TLSv1.1 or TLSv1.2 and if remove SSLv3 Thunderbird stop to work on SMTP.

See this bog post https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/

Like Firefox, Thunderbird a product that shares the same Geko core also disabled SSLV3. in that version.

You might also look to this Bug where the Poodle issue was dealt with https://bugzilla.mozilla.org/show_bug.cgi?id=1076983

Also of interest is https://bugzilla.mozilla.org/show_bug.cgi?id=1107037

Matt said

See this bog post https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/ Like Firefox, Thunderbird a product that shares the same Geko core also disabled SSLV3. in that version. You might also look to this Bug where the Poodle issue was dealt with https://bugzilla.mozilla.org/show_bug.cgi?id=1076983 Also of interest is https://bugzilla.mozilla.org/show_bug.cgi?id=1107037

Thank you for your reply. I have disabled to SSLv3 on my server so continue to not understand why IF I ALLOW TLSv1.2 in Exim with tls_require_ciphers = Thunderbird are unable to send email.

Also the error console don't help me to understand what is wrong, just told ssl_error_no_cypher_overlap and that is strange as TLSv.1.2 should be supported. I have inserted in Exim instruction so why Thunderbird are unable to connect?

I AM not using old Thunderbird, I AM not using IE or other old browser who doesn't support SSL3 and I AM not using SSL3.

This seems to be not an issue with Thunderbird but server side.