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Self-hosted mail server

mailcow

mailcow is self-hosted mail software; you manage the server and domain.

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Key parameters by plan

mailcow: dockerized

Price and billing
Not confirmed
Sources checked:
Storage
Not confirmed
Phone verification
Not confirmed
Attachment size limit
Not confirmed
Self-managed hosting
Yes

Requires a supported Linux server, Docker, a domain, open mail ports and DNS configuration.

[3]Sources checked:
System requirements
Default configuration: at least 6 GiB RAM, 1 GiB swap, 20 GiB disk excluding email.

Supported systems and resource needs vary; consult installation documentation.

[6]Sources checked:

Why consider it

mailcow is self-hosted mail software; you manage the server and domain.

  • Receive email — mailcow: dockerized
  • Start a new email — mailcow: dockerized
  • Your own domain — mailcow: dockerized
  • Multiple aliases — mailcow: dockerized
  • Two-factor authentication — mailcow: dockerized
  • IMAP access — mailcow: dockerized
  • SMTP access — mailcow: dockerized

Before you choose

  • Requires your own server and domain, plus ongoing setup and maintenance. The software is not a hosted mailbox.

Recorded plans

mailcow: dockerized

    Plan capabilities

    Plan capabilitiesmailcow: dockerized
    No account required
    Not confirmed
    No phone required
    Not confirmed
    No existing email required
    Not confirmed
    Receive email
    Yes
    [3]Sources checked:
    Reply to email
    Not confirmed
    Start a new email
    Yes
    [3]Sources checked:
    Your own domain
    Yes
    [3]Sources checked:
    Catch-all on your domain
    Not confirmed
    Provider subdomain wildcard
    Not confirmed
    Multiple aliases
    Yes
    [3]Sources checked:
    Two-factor authentication
    Yes

    TOTP and security keys are supported; mailbox users require app passwords for external clients.

    [5]Sources checked:
    Zero-access mailbox encryption
    Not confirmed
    End-to-end encryption available
    Not confirmed
    Hide your main address
    Not confirmed
    Attachments
    Not confirmed
    Mobile app
    Not confirmed
    IMAP access
    Yes
    [3]Sources checked:
    SMTP access
    Yes

    Default SMTP submission uses port 587 with STARTTLS; configuration can vary.

    [4]Sources checked:
    API access
    Not confirmed
    Inbox protected by an access credential
    Not confirmed
    Extend address lifetime
    Not confirmed
    Messages expire within 24 hours
    Not confirmed

    Official sources

    1. mailcow: dockerized - Blog · 2026-11-02
    2. mailcow: dockerized documentation · 2026-11-02
    3. mailcow: dockerized documentation · 2026-11-02
    4. Manual configuration · 2026-11-02
    5. Two-Factor Authentication · 2026-11-02
    6. Prepare your system · 2026-11-02

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