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He ran it on a VM with 2GB of RAM. Three minutes later—SMTP was up. POP3. IMAP. Even a web admin interface that looked like it was designed by an engineer who hated designers.
Since hMailServer is often used by smaller organizations that may not have global traffic, a powerful addition would be Zero-Trust Geo-Fencing How it works
Because version 5.7 is often considered a "preview" or "build" branch rather than a final stable release on the main website, you may need to look beyond the primary download page: Official Build Server
