- [Dovecot](https://www.dovecot.org/) (IMAP/POP server for retrieving mail)
- [MariaDB](https://mariadb.org/) (database to store user information, etc.)
- [Memcached](https://www.memcached.org/) (cache for the SOGo webmailer)
- [Netfilter](https://www.netfilter.org/) (Fail2ban-like integration of [@mkuron](https://github.com/mkuron))
- [Nginx](https://nginx.org/) (Web server for the mailcow UI)
- [Oletools](https://github.com/decalage2/oletools) via [Olefy](https://github.com/HeinleinSupport/olefy) (analyzing office documents for viruses, macros, etc.)
- [PHP](https://php.net/) (programming language for most web-based mailcow actions)
- [Postfix](http://www.postfix.org/) (Receiver/sender for mail traffic on the Internet)
- [Redis](https://redis.io/) (storage for spam information, DKIM keys, etc.)
- [Rspamd](https://www.rspamd.com/) (spam filter with automatic learning of spam mails)
- [SOGo](https://sogo.nu/) (integrated webmailer and cal/carddav interface)
- [Solr](https://solr.apache.org/) (full-text search for IMAP connections for quick email search) (optional)
- [Unbound](https://unbound.net/) (integrated DNS server to check DNSSEC etc.)
- A watchdog for basic monitoring of container health inside mailcow
But the heart of mailcow is the graphical web interface, the **mailcow UI**.
It offers a place for almost all settings and allows the comfortable creation of new domains and email addresses with just a few clicks.
But also other or more tricky tasks can be done in it with ease:
- [DKIM](http://dkim.org) and [ARC](http://arc-spec.org/) support/generation.
- Black and white lists per domain and per user.
- Spam score management per user (reject spam, flag spam, greylist).
- Allow mailbox users to create temporary spam aliases
- Prepend email tags to subject or move emails to subfolders (per user)
- Allow mailbox users to toggle TLS enforcement for inbound and outbound messages
- Users can reset caches on SOGo ActiveSync devices
- imapsync to periodically migrate or retrieve remote mailboxes
- TFA: Yubikey OTP and WebAuthn USB (Google Chrome and derivatives only), TOTP
- Add whitelist hosts to forward mail to mailcow
- Fail2ban-like integration
- Quarantine system
- Anti-virus scanning including macro scanning in Office documents
- Integrated basic monitoring
- And much more...
The mailcow data (such as emails, user data, etc.) is stored in **Docker volumes** - take good care of these volumes:
- clamd-db-vol-1
- crypt-vol-1
- mysql-socket-vol-1
- mysql-vol-1
- postfix-vol-1
- redis-vol-1
- rspamd-vol-1
- sogo-userdata-backup-vol-1
- sogo-web-vol-1
- solr-vol-1
- vmail-index-vol-1
- vmail-vol-1
!!! warning
The mails are compressed and encrypted. The key pair can be found in crypt-vol-1. Please don't forget to backup this and other volumes. #nobackupnopity
---
## Support the mailcow project
Please consider a support contract for a small monthly fee at [Servercow](https://www.servercow.de/mailcow?lang=en#support)[^1] to support further development. _We_ support _you_ while _you_ support _us_. :)
If you are super awesome and would like to support without a contract, you can get a SAL (Stay-Awesome License) that confirms your awesomeness (a flexible one-time payment) at [Servercow](https://www.servercow.de/mailcow?lang=en#sal).
For professional and prioritized commercial support you can sign a basic support subscription at [Servercow](https://www.servercow.de/mailcow?lang=en#support). For custom inquiries or questions please contact us at [info@servercow.de](mailto:info@servercow.de) instead.
Furthermore we do also provide a fully featured and managed mailcow [here](https://www.servercow.de/mailcow?lang=en#managed). This way we take care about the technical magic underneath and you can enjoy your whole mail experience in a hassle-free way.
The other alternative is our free community-support on our various channels below. Please notice, that this support is driven by our awesome community around mailcow. This kind of support is best-effort, voluntary and there is no guarantee for anything.
- Our mailcow community @ [community.mailcow.email](https://community.mailcow.email)
Since September 2022 we´re providing two seperate Demo instances:
+ **[demo.mailcow.email](https://demo.mailcow.email)** is the classic Demo based on the **stable releases**.
+ **[nightly-demo.mailcow.email](https://nightly-demo.mailcow.email)** is the new **nightly demo** based on unreleased testing features. (So especially interesting for those who have no possibility to create a test instance themselves.)
