Re-Enabling TLS1.1 in dovecot 2.3.16

Hi,

I'd like to re-enable TLS1.1 (at least temporary) to see if it fixes a problem with one of my clients.

When I add "ssl_min_protocol = TLSv1.1" to either dovecot.conf or conf.d/10-ssl.conf it doesn't seem to have an effect.

Still the client is not working. I used testssl.sh to check the available ssl versions and it says that tls1.1 is not offered:

$ ./testssl.sh --starttls imap SERVERNAME.TLD:143 ... Service set:            STARTTLS via IMAP

 Testing protocols via sockets

 SSLv2      not offered (OK) SSLv3      not offered (OK) TLS 1      not offered TLS 1.1    not offered TLS 1.2    offered (OK) TLS 1.3    offered (OK): final

Kind regards, Nils