Excellent, thank you again.

The openssl command I have tried (that used to work with Dovecot 2.2) is:

openssl s_client -connect mail.privustech.com:143

I have also tried

openssl s_client -connect mail.privustech.com:143 -servername mail.privustech.com

I've posted the full output from this to https://pastebin.com/eUSarQdx

I've posted te full output from dovecot -n to https://pastebin.com/F8RaC4bt

Thank you again, Andy

On Sat, 2018-12-15 at 17:27 +0100, Alexander Dalloz wrote:

Am 15.12.2018 um 17:16 schrieb C. Andrews Lavarre:

		to /etc/apparmor.d/local/usr.lib.dovecot.imap-login but still
cannot login with either the mail client or with explicit openssl: it
complains
		error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown
protocol:s23_clnt.c:794:


Hi,

that error above typically means to connect with SSL to STARTTLS or vice 
versa.

Please provide the complete command you issue using "openssl s_client" 
together with the corresponding dovecot logging. As well the output of 
"doveconf -n" would be useful to help you further.

Alexander