With Gogs' ability to authenticate over SMTP it is trivial to integrate it with mailcow. Few changes are needed:

1. In order to create a database for Gogs, connect to your shell and execute the following commands:

source mailcow.conf
docker exec -it $(docker ps -f name=mysql-mailcow -q) mysql -uroot -p${DBROOT} -e "CREATE DATABASE gogs;"
docker exec -it $(docker ps -f name=mysql-mailcow -q) mysql -uroot -p${DBROOT} -e "CREATE USER 'gogs'@'%' IDENTIFIED BY 'your_strong_password';"
docker exec -it $(docker ps -f name=mysql-mailcow -q) mysql -uroot -p${DBROOT} -e "GRANT ALL PRIVILEGES ON gogs.* TO 'gogs'@'%';

2. Open docker-compose.override.yml and add Gogs:

version: '2.1'

      image: gogs/gogs
        - ./data/gogs:/data
            - gogs
        - "${GOGS_SSH_PORT:-}:22"

3. Create data/conf/nginx/site.gogs.custom, add:

location /gogs/ {
    proxy_pass http://gogs:3000/;

4. Open mailcow.conf and define the binding you want Gogs to use for SSH. Example:


5. Run the commands to bring up the Gogs container and restart the nginx-mailcow container afterwards:

docker compose up -d
docker compose restart nginx-mailcow
docker-compose up -d
docker-compose restart nginx-mailcow

6. Open http://${MAILCOW_HOSTNAME}/gogs/, for example http://mx.example.org/gogs/. For database details set mysql as database host. Use the value gogs as database name, gogs as database user and your_strong_password you previously definied at step 1 as database password.

7. Once the installation is complete, login as admin and set "settings" -> "authorization" -> "enable SMTP". SMTP Host should be postfix with port 587, set Skip TLS Verify as we are using an unlisted SAN ("postfix" is most likely not part of your certificate).

8. Create data/gogs/gogs/conf/app.ini and set following values. You can consult Gogs cheat sheet for their meaning and other possible values.

# For GOGS_SSH_PORT= in mailcow.conf, set:
SSH_PORT = 4000
# For MAILCOW_HOSTNAME=mx.example.org in mailcow.conf (and default ports for HTTPS), set:
ROOT_URL = https://mx.example.org/gogs/

9. Restart Gogs with the following command. Your users should be able to login with mailcow managed accounts.

docker compose restart gogs-mailcow
docker-compose restart gogs-mailcow