diff -urNpa dovecot-ce-2.3.0.orig/doc/example-config/conf.d/10-ssl.conf dovecot-ce-2.3.0/doc/example-config/conf.d/10-ssl.conf
--- dovecot-ce-2.3.0.orig/doc/example-config/conf.d/10-ssl.conf	2017-12-22 13:53:36.000000000 +0000
+++ dovecot-ce-2.3.0/doc/example-config/conf.d/10-ssl.conf	2018-01-19 10:16:36.961648643 +0000
@@ -3,14 +3,14 @@
 ##
 
 # SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt>
-#ssl = yes
+ssl = no
 
 # PEM encoded X.509 SSL/TLS certificate and private key. They're opened before
 # dropping root privileges, so keep the key file unreadable by anyone but
 # root. Included doc/mkcert.sh can be used to easily generate self-signed
 # certificate, just make sure to update the domains in dovecot-openssl.cnf
-ssl_cert = </etc/ssl/certs/dovecot.pem
-ssl_key = </etc/ssl/private/dovecot.pem
+#ssl_cert = </var/lib/openssl/certs/imap.pem
+#ssl_key = </var/lib/openssl/private/imap.pem
 
 # If key file is password protected, give the password here. Alternatively
 # give it when starting dovecot with -p parameter. Since this file is often