spacecowboy/dovecot repository overview

⁠spacecowboy/dovecot

Dovecot is the IMAP/POP/Authentication server and is run with:

docker run --rm --name=dovecot \
  --net=mail_network \
  --hostname=mail.example.com \
  -e mydomain=example.com \
  -p 110:110 \
  -p 995:995 \
  -p 143:143 \
  -p 993:993 \
  -p 4190:4190 \
  -v /root/mail:/var/vmail \
  -v /etc/letsencrypt/live/example.com/privkey.pem:/etc/ssl/private/dovecot.pem \
  -v /etc/letsencrypt/live/example.com/fullchain.pem:/etc/ssl/certs/dovecot.pem \
  -t spacecowboy/dovecot

Dovecot needs to know the primary hostname it is providing mail at, this is done with --hostname for the FQDN, and -e mydomain for just the domain level.

The ports are all optional to expose, depending on what services you want. Note that dovecot will require TLS on all ports. Imap is provided on ports 143 and 993. Pop is provided on ports 110 and 995. Port 4190 is for ManageSieve⁠ to allow users to configure server-side scripting.

You should override the default certificates with your own. The best way is to use LetsEncrypt⁠ to generate a certificate for all domains you intend to host email for. If you really don't want to however (for testing for example), you can just omit those volumes and use dovecot's self-signed one.