I have setup website using letsencrypt for certification. how can I setup IMAP to use this certs as well?
Make entries in /etc/dovecot/conf.d/10-ssl.conf
ssl = required
ssl_cert = </etc/letsencrypt/live/mail.example.com/cert.pem ssl_key = </etc/letsencrypt/live/mail.examplel.com/privkey.pem
Keep in mind the subject name (CN or SAN AltNames) of your certificate must match your IMAP server name e.g. if your certificate is made for "www.mydomain.com", you'll have to configure your IMAP clients to also use "www.mydomain.com" as the IMAP server name.
This typically means the web and IMAP server must reside on the same server, otherwise you'll have to use DNS challenge method to support multiple hostnames on the same certificate.
Joseph Tam <jtam.home@gmail.com>