To generate SSL certificates for Dovecot, use the following method.
If you have the following in your dovecot.conf file:
ssl_cert_file = /etc/ssl/dovecot/certs/dovecot.pem ssl_key_file = /etc/ssl/dovecot/private/dovecot.pem
Use the following (as root) to generate the new certificates:
openssl req -new -x509 -nodes -out /etc/ssl/dovecot/certs/dovecot.pem \ -keyout /etc/ssl/dovecot/private/dovecot.pem -days 3650
The above should all be on one line (without the "\"). It generates new X.509 certificates which are valid for 10 years.
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