Install the iRedMail open-source stack on a clean host
Choose a currently supported operating system and account backend and distinguish open-source installation from Enterprise setup.
Reviewed
iRedMail’s documentation includes both Open Source and Enterprise paths. Select the open-source installer instructions intentionally; features or management tools shown for a paid edition are not automatically available in the free deployment.
For the trade-offs of host-installed packages versus containers, see iRedMail in our Linux mail-server comparison.
Use the official iRedMail Debian/Ubuntu installation instructions for that host family; choose the matching OS guide from the documentation index for other supported systems.
Prepare the host and backend
- Use the supported operating-system list in iRedMail’s documentation, checking the chosen release rather than relying on the roundup’s older version details.
- Start with the required clean host, stable hostname/addressing, permitted mail ports, and reverse DNS.
- Choose the supported account/database backend during installation and record that choice for later management and backup procedures.
- Review the installer and resulting credentials/configuration, then secure administrative access and trusted TLS.
An LDAP deployment and a SQL deployment need different account-management and recovery instructions. Do not paste database commands from one backend into another.
Verify before production receipt
Complete the post-install DNS guidance for A/PTR/MX/SPF/DKIM/DMARC and test a controlled mailbox. Confirm IMAP, authenticated SMTP, certificate identity, and rejection of unauthorized relay.
Keep production MX unchanged until recovery and client checks pass. Distinguish iRedAdmin-Pro/Enterprise capabilities from open-source account administration when documenting operator workflows; an edition mismatch is not fixed by granting a broader credential or manually altering generated configuration.