hMailServer - Free open source email server for Microsoft WindowsNOTE: No active development hMailServer is no longer being actively developed or maintained. Read more. hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world. It supports the common e-mail protocols (IMAP, SMTP and POP3) and can easily be integrated with many existi
