Pmail
Pmail
http://www.pmail.com
Download
Axigen - isp mail server with virtually unlimited users
http://download.chip.eu/nl/AXIGEN-Mail-Server-Service-Provider-Edition_3684674.html
Argosoft
Here you can download argosoft products
http://www.argosoft.com/rootpages/Download.aspx
Softpedia
Download xmail - an internet and intranet mail server featuring an smtp server, pop3 server
http://www.softpedia.com/get/Internet/Servers/E-mail-Servers/XMail.shtml
Youngzsoft
Cmailserver is an email mail server software for windows, which provide web based email service. you can use it to setup your own internet mail server and provide e-mail service for your company and friends. cmailserver is also an anti-virus mail server and anti-spam email server. it's easy to control your pop3/smtp mail connections. this web mail server provides an open developing interface for web developers who want to customize the web mail pages.
http://www.youngzsoft.net/cmailserver/email-server-download.htm
Axigen
Axigen is a fast, reliable and secure linux, freebsd, netbsd, openbsd, solaris based mail server software, offering integrated smtp, pop3, imap and webmail servers, enabling the system administrator to have full control of traffic through the email server.
http://www.axigen.com/mail-server/download
Mercury Mail Transport
Mercury Mail Transport
http://www.pmail.com/overviews/ovw_mercury.htm
DeskNow Mailserver Lite
Desknow mail and collaboration server is a powerful and easy to use mail and groupware server with integrated document management, ical, instant messaging, syncml support and much more.
http://www.desknow.com/
Hmailserver
Hmailserver
http://www.hmailserver.com
SquirrelMail
SquirrelMail
http://www.squirrelmail.org/