Frank Bonnet wrote:
ssl_cert = </etc/ssl/certs/dovecot.pem ssl_key = </etc/ssl/private/dovecot.pem
Does your configuration file have those "<" characters in it? If so, try getting rid of those.
ssl_cert = /etc/ssl/certs/dovecot.pem ssl_key = /etc/ssl/private/dovecot.pem
