Hi,
on Dovecot Version 2.2.10
Apr 15 16:01:10 nse dovecot: config: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:105: ssl_ca_file has been replaced by ssl_ca = <file apr="" 15="" 16:01:10="" nse="" dovecot:="" config:="" warning:="" obsolete="" setting="" in="" etc="" dovecot="" dovecot.conf:106:="" protocol="" {="" ssl_listen="" }="" has="" been="" replaced="" by="" service="" inet_listener="" address="" also="" one="" moved="" from="" dovecot.conf="">ssl.conf
d.</file>
Looks like Webmin is still setting the old directive in some cases. I'll prevent this in the next release.