Webmail + letsencrypt free certificate + secure email server (IMAPS and SMTP-TLS) docker-compose cluster based on the following base images:

• mailserver
• base for mailserver
• php7fpm
• webmail

In addition to the docker images, this source tarball is also used

Quick Usage (links above have more extensive documentation):

letsencrypt should be enabled first to secure our email ports

docker pull certbot/certbot

get initial certificate, make sure DNS works for your domain

docker run -it --rm -p 80:80 -v /etc/letsencrypt:/etc/letsencrypt -v /var/log/letsencrypt:/var/log/letsencrypt certbot/certbot certonly --standalone --preferred-challenges http -d DOMAIN.COM --email EMAIL@ADDRESS --agree-tos

renew certificate

docker run -it --rm -p 80:80 -v /etc/letsencrypt:/etc/letsencrypt -v /var/log/letsencrypt:/var/log/letsencrypt certbot/certbot renew --preferred-challenges http

generate diffie-hellman for nginx

openssl dhparam -out /etc/letsencrypt/dhparam.pem 2048

start email-stack cluster, takes an extra minute or two to create and populate volumes

• cp .env.tmpl .env # make adjustments to .env to match your desired environment
• ./email-stack-ctl.sh createvol
• ./email-stack-ctl.sh startd

stop email-stack cluster

./email-stack-ctl.sh stop

systemd, configured to run from /opt/email-stack

• cp ./email-stack.service /lib/systemd/system/
• systemctl start email-stack.service

adding email user(s)

docker run --rm -e MAIL_USER=your@email.com -e MAIL_PASS=pickYourPassword -ti tvial/docker-mailserver:latest /bin/sh -c 'echo "$MAIL_USER|$(doveadm pw -s SHA512-CRYPT -u $MAIL_USER -p $MAIL_PASS)"' >> mailserver/config/postfix-accounts.cf

generate dkim config

docker run --rm -v "$(pwd)/mailserver/config":/tmp/docker-mailserver -ti tvial/docker-mailserver:latest generate-dkim-config

# also need to create DNS TXT record with the contents of ./mailserver/config/opendkim/keys/yourdomain.com/mail.txt