MDaemon, Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs. Security features include Greylisting, DKIM, DomainKeys, SPF, Sender ID.

Winmail Server is an enterprise class mail server software system offering a robust feature set, including extensive security measures. Winmail Server supports SMTP, POP3, IMAP, Webmail, LDAP, multiple domains, SMTP authentication, spam protection

Email Server with free upgrades and unlimited users for $39. For small or medium businesses and home environments. Is easy to use and provides you with full control over email domains, mailboxes and aliases.

VisNetic Mail Server is a multi-featured mail server that will scale to meet the email and instant messaging needs of any sized organization, including ISP and ASP environments.

Email sender (SMTP server) can be used by 3rd party software programs to send system alert notifications, SMS alerts, e-Commerce, security alerts, direct (bulk) mail, email notifications and alerts

MailEnable Standard provides robust SMTP and POP3 services for Windows NT/2000/XP/2003 systems. Simple installation procedure and powerful administration tools means that you will be up and running quickly. FREE for personal and commercial use.

MailEnable Professional Edition is a enterprise level mail server for Windows 2000/NT/XP. It supports SMTP and POP3, supports an unlimited amount of email addresses, domains, groups and mailing lists.

MailEnable Enterprise Edition is designed for organisations or ISP's dealing with high volumes of mail, requiring greater control and flexibility over mail services.

MDaemon GroupWare unlocks the collaborative functions of Microsoft Outlook using MDaemon as the mail server platform. Outlook users can share Calendar, Tasks, Contacts, Notes, and Journal folders without the expense or expertise required by Exchange.

The Email Server is a Microsoft Windows-based SMTP and POP3 server

Officium Business Server is a revolutionary web-based office collaboration server that boasts 20 powerful business tools including a full blown email server and 100% compatible MS Office suite of tools.

SnugServer is an Email Server, Web Server, FTP Server, NewsServer and ListServer. It's your all-in-one solution to managing your Internet Presence. Comes with Anti-Spam, Anti-Virus & SSL/TLS/S/MIME Encryption. Allows Digital Certificate creation.