ArGoSoft Mail Server Freeware
Full user review
"Surprisingly easy and efficient"
I have liked this server right from the beginning. The options-dialogs offer a quick setup of the server. It has user-management (but can still send anonymously), a webmailer-interface(!) and supports DynDNS. Resides in the notification area and works just as it says. Thank you
Not encountered any flaws... But I surely will when I try to use POP3 also instead of only SMTP :) But I still can recommend the free tool !