Trinidad and Tobago Computer Society Collection of Free and Open Source Software for WINdows

hMailServer is a e-mail server for Windows which supports all the common e-mail protocols: IMAP, SMTP and POP3. It allows you to handle all your email internally without having to rely on cloud storage or an internet service provider.

MailServer works with any web mail system that supports SMTP and IMAP4 and supports the very popular open source virus scanner ClamAV and includes spam-stopping mechanisms