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# mailcow: dockerized - 🐮 + 🐋 = 💕

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## About mailcow: dockerized
mailcow dockerized comes with **11 containers** linked in a mailcow network:
- Dovecot
- Memcached
- Redis
- MySQL
- PowerDNS Recursor
- PHP-FPM
- Postfix
- Nginx
- Rmilter
- Rspamd
- SOGo

**4** volumes to keep dynamic data - take care of them!
- vmail-vol-1
- dkim-vol-1
- redis-vol-1
- mysql-vol-1
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All configurations were written with security in mind.

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*[Looking for a farm to host your cow?](https://www.servercow.de)* 

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### Container and volume overview

| Type      | Object name       | Network names                | External binding                             | Internal binding     | Volumes                                                                                                                                                                                       |
|-----------|-------------------|------------------------------|----------------------------------------------|----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Container | postfix-mailcow   | ${MAILCOW_HOSTNAME}, postfix | 25/tcp, 465/tcp, 587/tcp                     | 588/tcp              | ./data/conf/postfix => /opt/postfix/conf, ./data/assets/ssl => /etc/ssl/mail/:ro                                                                                                              |
| Container | dovecot-mailcow   | ${MAILCOW_HOSTNAME}, dovecot | 110/tcp, 143/tcp, 993/tcp, 995/tcp, 4190/tcp | 24/tcp, 10001/tcp    | vmail-vol-1 => /var/vmail, ./data/conf/dovecot => /etc/dovecot, ./data/assets/ssl => /etc/ssl/mail/:ro                                                                                        |
| Container | nginx-mailcow     | nginx                        | 443/tcp                                      | 80/tcp, 8081/tcp     | Mounts from sogo-mailcow, ./data/web => /web:ro, ./data/conf/rspamd/dynmaps => /dynmaps:ro, ./data/assets/ssl/ => /etc/ssl/mail/:ro, ./data/conf/nginx/ => /etc/nginx/conf.d/:ro              |
| Container | pdns-mailcow      | pdns                         | -                                            | 53/udp               | ./data/conf/pdns/ => /etc/powerdns/                                                                                                                                                           |
| Container | rspamd-mailcow    | rspamd                       | -                                            | 11333/tcp, 11334/tcp | dkim-vol-1 => /data/dkim, ./data/conf/rspamd/override.d/ => /etc/rspamd/override.d:ro, ./data/conf/rspamd/local.d/ => /etc/rspamd/local.d:ro, ./data/conf/rspamd/lua/ => /etc/rspamd/lua/:ro  |
| Container | mysql-mailcow     | mysql                        | -                                            | 3306/tcp             | mysql-vol-1 => /var/lib/mysql/, ./data/conf/mysql/ => /etc/mysql/conf.d/:ro                                                                                                                   |
| Container | rmilter-mailcow   | rmilter                      | -                                            | 9000/tcp             | ./data/conf/rmilter/ => /etc/rmilter.conf.d/:ro                                                                                                                                               |
| Container | phpfpm-mailcow    | phpfpm                       | -                                            | 9000/tcp             | dkim-vol-1 => /data/dkim, ./data/web => /web:ro, ./data/conf/rspamd/dynmaps => /dynmaps:ro                                                                                                    |
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| Container | sogo-mailcow      | sogo                         | -                                            | 20000/tcp            | ./data/conf/sogo/ => /etc/sogo/, /usr/lib/GNUstep/SOGo/WebServerResources/                                                                                                             |
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| Container | redis-mailcow     | redis                        | -                                            | 6379/tcp             | redis-vol-1 => /data/                                                                                                                                                                         |
| Container | memcached-mailcow | memcached                    | -                                            | 11211/tcp            | -                                                                                                                                                                                             |
| Volume    | vmail-vol-1       | -                            | -                                            | -                    | Mounts to dovecot                                                                                                                                                                             |
| Volume    | dkim-vol-1        | -                            | -                                            | -                    | Mounts to rspamd + phpfpm                                                                                                                                                                     |
| Volume    | redis-vol-1       | -                            | -                                            | -                    | Mounts to redis                                                                                                                                                                               |
| Volume    | mysql-vol-1       | -                            | -                                            | -                    | Mounts to mysql                                                                                                                                                                               |

### Network
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All containers share a network "mailcow-network" with the subnet 172.22.1.0/24 - if you want to change it, set it in the composer file.
IPs are dynamic except for PowerDNS resolver which has a static ip address 172.22.1.254.
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**FAQ**
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- rspamd learns mail as spam or ham when you move a message in or out of the junk folder to any mailbox besides trash.
- rspamd auto-learns mail when a high or low score is detected (see https://rspamd.com/doc/configuration/statistic.html#autolearning)
- You can upgrade containers by running `docker-compose pull && docker-compose up -d`.
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1. You need Docker and Docker Compose. Most systems can install Docker by running `wget -qO- https://get.docker.com/ | sh` - see [this link](https://docs.docker.com/compose/install/) for installing Docker Compose.
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2. Clone this repository and configure `mailcow.conf`, do not use special chars in passwords in this file (will be fixed soon).
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3. `docker-compose up -d` - leave the `-d` out for a wall of logs in case of debugging.
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Done.

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You can now access https://${MAILCOW_HOSTNAME} with the default credentials `admin` + password `moohoo`. The database will be initialized when you first visit the UI.

## Configuration after installation
### Rspamd UI access
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At first you may want to setup Rspamds web interface which provides some useful features and information.
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1. Set a Rspamd controller password:
```
# Generate hash
docker-compose exec rspamd-mailcow rspamadm pw
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2. Replace the default hash in `data/conf/rspamd/override.d/worker-controller.inc` by your newly generated:
```
enable_password = "myhash";
```
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3. Restart rspamd:
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docker-compose restart rspamd-mailcow
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Open https://${MAILCOW_HOSTNAME}/rspamd in a browser and login!
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### SSL (and: How to use Let's Encrypt)
mailcow dockerized comes with a snakeoil CA "mailcow" and a server certificate in `data/assets/ssl`. Please use your own trusted certificates.

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mailcow uses 3 domain names that should be covered by your new certificate:
- ${MAILCOW_HOSTNAME}
- autodiscover.example.org (used for ActiveSync)
- autoconfig.example.org (used by Thunderbird and derivates)

**Obtain multi-SAN certificate by Let's Encrypt**
This is just an example of how to obtain certificates with certbot. There are several methods!
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1. Get the certbot client:
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wget https://dl.eff.org/certbot-auto -O /usr/local/sbin/certbot && chmod +x /usr/local/sbin/certbot
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2. Disable applications blocking port 80 and run certbot:
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cd /path/to/git/clone/mailcow-dockerized
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source mailcow.conf
certbot certonly \
	--standalone \
	--standalone-supported-challenges http-01 \
	-d ${MAILCOW_HOSTNAME} \
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	-d autodiscover.example.org \
	-d autoconfig.example.org \
	--email you@example.org \
	--agree-tos
```
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3. Create hard links to the full path of the new certificates. Assuming you are still in the mailcow root folder:
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mv data/assets/ssl/cert.{pem,pem.backup}
mv data/assets/ssl/key.{pem,pem.backup}
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ln $(readlink -f /etc/letsencrypt/live/${MAILCOW_HOSTNAME}/fullchain.pem) data/assets/ssl/cert.pem
ln $(readlink -f /etc/letsencrypt/live/${MAILCOW_HOSTNAME}/privkey.pem) data/assets/ssl/key.pem
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4. Restart containers which use the certificate:
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docker-compose restart postfix-mailcow
docker-compose restart dovecot-mailcow
docker-compose restart nginx-mailcow
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When renewing certificates, run the last two steps (link + restart) as post-hook in a script.
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## Other useful commands and examples
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All commands need to be run from within `/path/to/git/clone/mailcow-dockerized`.
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### Get bash-completion for docker-compose
For the tab-tab... :-)
```
curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose
```
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### Logs
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You can use `docker-compose logs $service-name` for almost all containers. Only rmilter does not log to stdout. You can check rspamd logs for rmilter responses.
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Run `docker-compose logs` for all logs at once.
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### MySQL
Connect to the MySQL database:
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```
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source mailcow.conf
docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME}
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```
Reset mailcow admin to `admin:moohoo`:
```
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# 1. Drop admin table
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source mailcow.conf
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docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME} -e "DROP TABLE admin;"
# 2. Open mailcow UI to auto-init the db
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```
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Backup the database:
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source mailcow.conf
DATE=$(date +"%Y%m%d_%H%M%S")
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docker-compose exec mysql-mailcow mysqldump --default-character-set=utf8mb4 -u${DBUSER} -p${DBPASS} ${DBNAME} > backup_${DBNAME}_${DATE}.sql
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### Redis
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Connect to redis key store:
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```
docker-compose exec redis-mailcow redis-cli
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```

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### Rspamd:
Rspamd CLI tools:
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```
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docker-compose exec rspamd-mailcow rspamc --help
docker-compose exec rspamd-mailcow rspamadm --help
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```
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### Dovecot:
Run doveadm:
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```
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docker-compose exec dovecot-mailcow doveadm
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```
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Backup maildir (simple tar file):
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docker run --rm -it -v $(docker inspect --format '{{ range .Mounts }}{{ if eq .Destination "/var/vmail" }}{{ .Name }}{{ end }}{{ end }}' $(docker-compose ps -q dovecot-mailcow)):/vmail -v ${PWD}:/backup debian:jessie tar cvfz /backup/backup_vmail.tar.gz /vmail
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### Remove persistent data
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Remove volume `mysql-vol-1` to remove all MySQL data.
Remove volume `redis-vol-1` to remove all Redis data.
Remove volume `vmail-vol-1` to remove all contents of `/var/vmail` mounted to `dovecot-mailcow`.
Remove volume `dkim-vol-1` to remove all DKIM keys.
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### Scale it
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You can scale some services for mailcow, which is much more useful on a multi-host system. Please do not scale MySQL or Redis containers.
This is insufficiently tested!
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```
docker-compose scale rspamd-mailcow=2
docker-compose scale rmilter-mailcow=3
# ...
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```