I did the same thing on the console and this is what happens:
bash-3.2$ openssl s_client -connect example.com:993
CONNECTED(0003)
[...]
Server certificate
-BEGIN CERTIFICATE-
[...]
-END CERTIFICATE-
[...]
CA
---
No client certificate CA names sent
---
SSL handshake has read 45
If the expire plugin is enabled and a new message (not in trash) is
deleted via IMAP in Mozilla Thunderbird (only tested in this client), it
will indefinately copy the message into the folder. Dovecot, meanwhile,
occupies itself with this:
r...@server:~# cat /var/log/dovecot.log
[...]
dovecot