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Our mailcow Products

mailcow, Mailcow, MailCow?

The correct spelling is mailcow – in lowercase – as it is a registered trademark.

Of course, you are free to call mailcow whatever you like.

What is the difference between hosted mailcow (mailcow Groupware) and managed mailcow?

The two variants differ in several key aspects:

Features

mailcow Groupware

Note

This offering is not based on mailcow: dockerized but on a standalone development.

  • One domain per subscription
  • 20 GB storage per domain (max. 50 GB)
  • Unlimited number of aliases and domain aliases
  • Shared system environment (used together with hundreds of other customers)
  • Sending limit: max. 25 emails or recipients per minute (for mailboxes older than 1 day; otherwise 5 per minute)1
  • Predefined spam and security policies
  • Uniform server configuration for all users (no individual customization possible)
  • Limited support for Exchange ActiveSync (EAS)2
  • Temporary spam aliases
  • Controllable TLS encryption (incoming and outgoing)
  • Support for tags
  • DKIM and ARC signatures
  • Daily backups of email data

managed mailcow

Note

This offering is based on mailcow: dockerized – the exact open-source project you know from GitHub.

  • No domain restriction
  • 100 GB storage in the standard plan (more on request)3
  • Dedicated virtual machine with sufficient performance for mailcow: dockerized
  • Regular automatic updates4
  • Includes support for mailcow: dockerized
  • Enhanced protection through exclusive virus signatures
  • Ability to implement individual configurations
  • 35 ActiveSync devices included (expandable)
  • Dedicated, “clean”5 IPv4 and IPv6 addresses
  • Full server backups

Use Cases

When is mailcow Groupware suitable?

  • You want to manage a single domain with email addresses, e.g., for private purposes or small teams.
  • You prefer a simple, maintenance-free solution without technical management effort.
  • Predefined security settings and fixed limits are sufficient for you.
  • You only need basic features like IMAP, SMTP, and webmail – possibly complemented by SOGo.
  • You do not need direct access to system configuration or individual settings.
  • Special configurations (e.g., CI or similar) are not important to you.

When is managed mailcow the better choice?

  • You operate multiple domains and want to manage them centrally.
  • You need more storage, more flexibility, or dedicated resources.
  • You want full control over mailcow: dockerized and possibly make your own customizations (e.g., routes, filters, TLS policies).
  • You value full ActiveSync support, dedicated IP addresses, and maximum deliverability.
  • You already have experience with mailcow: dockerized or want to operate a scalable mail system in the long term – e.g., for agencies, companies, or technical power users.

  1. With a limit of 25 emails per minute, you can either send 25 individual messages to one recipient each or one message to 25 recipients. The number of recipients is decisive. ↩

  2. The groupware supports ActiveSync via SOGo in principle, but availability may vary depending on system load. ↩

  3. The booked storage space is the main limiting factor of the managed mailcow packages. ↩

  4. Updates are usually applied with a delay of one or two (mostly minor) versions to avoid introducing early-detected bugs into your production system. ↩

  5. “Clean” means that the IP addresses have not been flagged for previous spam activity. This ensures smooth email delivery. ↩