# Dovecot DOVECOT_VERSION=2.4.4-root DOVECOT_CONF=./data/dovecot.conf SUBMISSION_EXPOSE=587 SMTPS_EXPOSE=465 # SSL certificates SSL_CERT=/etc/letsencrypt/live/smtp.example.com/fullchain.pem SSL_KEY=/etc/letsencrypt/live/smtp.example.com/privkey.pem