Hello, I see the same problem after upgrading cyrus.
The option TLSv1.2:+TLSv1:+HIGH:!aNULL:@STRENGTH works but it is still not possible to connect with a TLSv1 only client like the BB10 Hup. I used the following configs tls_versions: tls1_2 tls1_0 tls_ciphers: TLSv1.2:+TLSv1:+HIGH:!aNULL:@STRENGTH Dec 3 16:23:01 host cyrus/imaps[13160]: no shared cipher in SSL_accept() -> fail Dec 3 16:23:01 host cyrus/imaps[13160]: imaps TLS negotiation failed:host. [1.1.1.1] Thorsten