Download Full Hmailserver 57 ((link)) -

: Full compatibility with IMAP, SMTP, and POP3.

5.7 is a preview/beta version rather than a stable production release.

Choose the directory where you want to install hMailServer. The default location is C:\Program Files\hMailServer . Click . 4. Select Components You will be prompted to choose which components to install: download full hmailserver 57

Always verify the SHA-256 hash. A legitimate hMailServer-5.6.8-B2574.exe should match the hash posted on the official forum.

Right-click the downloaded .exe file and select : Full compatibility with IMAP, SMTP, and POP3

However, the decision to download and deploy an older version of server software like 5.7 is not without significant risks. The primary concern with legacy software is security. Email servers are a primary attack vector for malicious actors. As vulnerabilities are discovered—such as buffer overflows, denial-of-service vulnerabilities, or flaws in the encryption implementation—software developers release patches. In the case of hMailServer, the developer has continued to iterate on the newer versions. Using an older version like 5.7 may expose a system to unpatched security flaws that have been fixed in later iterations. This creates a trade-off: the user secures the rights to free, open-source usage, but potentially sacrifices the security posture of their mail infrastructure.

Will you be using the or an external SQL server ? The default location is C:\Program Files\hMailServer

Windows Server 2012, 2016, 2019, 2022, or Windows 10/11 (for testing/local development). Framework: Microsoft .NET Framework 3.5 or higher.