mailcow

mailcow.email · checked 11 Oct 2026

#2 · Mail Server Software #2 · Email Server Software

Visit mailcow.email ↗ Alternatives mailcow vs Axigen

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Mail Server Software6.4#2 of 34

mailcow: dockerized is an open-source groupware and email suite based on Docker.

Pricing

mailcow: dockerizedOpen-source groupware and email suite; self-hosted with DockerFree
shared mailcowab 8,90€ pro Monat · 1 domain · 20 mailboxes · up to 50 GB · unlimited aliases and domain aliases · shared resources€8.90/mo
Ticket Support (Level 1)45,90€ pro Monat · 3 tickets per quarter · no phone or remote support · max. 1 day response time€45.90/mo
managed mailcowab 54,90€ pro Monat · Unlimited domains and mailboxes, subject to system resources · up to 500 GB · dedicated server · up to 35 ActiveSync devices included€54.90/mo
Telefon Support (Level 2)105,90€ pro Monat · 3 tickets per quarter · 30 minutes phone support per quarter · no remote support · max. 6 hours response time€106/mo
Remote Support (Level 3)165,90€ pro Monat · 5 tickets per quarter · 30 minutes phone or remote support per quarter · max. 4 hours response time€166/mo
Notfall Support (Level 4)430,00€ je Buchung (einmalig) · 120 minutes phone support · 120 minutes remote support · max. 2 hours response time€430 one-time

As docs.mailcow.email lists them, checked 11 Oct 2026.

Near it

All alternatives →

Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: mailcow.email
Price: Free tier · from €8.90/mo
Free trial: Not stated
Administration: The mailcow web interface lets administrators create domains and email addresses and manage most settings.
Community integrations: The docs list community-managed integrations including Nextcloud, Mailman 3, Portainer, Roundcube, CheckMK, and a Prometheus exporter.
Data storage: Mail is compressed and encrypted, and the encryption key pair is stored in the crypt-vol-1 Docker volume, which the documentation says to back up.
Email transport security: mailcow supports managing MTA-STS policies through its UI and documents DANE/TLSA support in its Postfix TLS policy component.
Headquarters: Willich, Germany
Integrations: The documentation lists client setup guides for Android, Apple macOS/iOS, eM Client, KDE Kontact, Outlook, and Thunderbird.
Mail authentication: The UI supports generating DKIM and ARC, managing per-domain and per-user blacklists and whitelists, and setting spam scores.
Mail services: Its components include Postfix for mail transfer, Dovecot for IMAP/POP, and SOGo for webmail, calendars, and contacts.
Platform limits: The documentation says not to install on NAS devices such as Synology or QNAP, OpenVZ, LXC, or other container platforms.
Requirements: The documented minimum is 1 GHz CPU, 6 GiB RAM plus 1 GiB swap, and 20 GiB disk excluding email storage; x86_64 and ARM64 are listed architectures.
Security: Two-factor authentication options include YubiKey OTP, WebAuthn, and TOTP.
Spam and malware: The suite includes Rspamd spam filtering and supports optional ClamAV antivirus scanning, including Office document macro scanning.

On these boards

Built mailcow?

Claim the page, then edit your card yourself from your member desk: its name, words, logo, screenshots, plans and links. Your desk shows how many readers open it.

Claim mailcow