<ol><li value="3">Your key/certificate doesn't have a '''.pem''' extension but they are PEM-encoded files. You can confirm that using the '''file''' command. If you're interested - here's some , learning more about configuring Dovecot for SSL, refer to the following documentation about : [http://wiki2.dovecot.org/SSL/DovecotConfiguration Dovecot SSL configuration].</li></ol>