Runs a slimta instance in a Docker container.

• KEY_FILE: The path to the private key file. Default: /etc/ssl/private/local/privkey.pem
• CERT_FILE: The path to the certificate file. Default: /etc/ssl/private/local/fullchain.pem
• REDIS_HOST: The hostname of the redis instance. Default: redis
• SPAMD_HOST: The hostname of the spamd instance. Default: spamd
• PYMAP_HOST: The hostname of the pymap instance. Default: pymap

For the full stack of IMAP and SMTP services with spamassassin and letsencrypt certificates, use this image as part of the slimta-docker stack.