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Self-hosted mail server

Mail-in-a-Box

Mail-in-a-Box is self-hosted mail software; you manage the server and domain.

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Key parameters by plan

Mail-in-a-Box self-hosted

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

Requires your own Ubuntu 22.04 x64 cloud server, domain, DNS configuration and mail ports.

[1]Sources checked:
Software license
CC0 public domain dedication

Self-hosting requires separate infrastructure and domain expenses.

[2]Sources checked:

Why consider it

Mail-in-a-Box is self-hosted mail software; you manage the server and domain.

  • Receive email — Mail-in-a-Box self-hosted
  • Start a new email — Mail-in-a-Box self-hosted
  • Your own domain — Mail-in-a-Box self-hosted
  • Multiple aliases — Mail-in-a-Box self-hosted
  • Two-factor authentication — Mail-in-a-Box self-hosted
  • IMAP access — Mail-in-a-Box self-hosted
  • SMTP access — Mail-in-a-Box self-hosted
  • API access — Mail-in-a-Box self-hosted

Before you choose

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

Recorded plans

Mail-in-a-Box self-hosted

    Plan capabilities

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

    Official documentation specifies the administrative control panel; not independently confirmed for webmail.

    [1]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
    [1]Sources checked:
    SMTP access
    Yes
    [1]Sources checked:
    API access
    Yes

    Administrative control-panel API; not a general mail-sending API.

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

    Official sources

    1. Mail-in-a-Box · 2026-11-02
    2. Mail-in-a-Box Setup Guide · 2026-11-02

    Choose by purpose

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