Four Calorie DNS Server (name server). This server runs as a Windows service, and handles ARecord, NS, MX, PTR, and SOA queries

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.

With the multi award winning GoGroupMail range of products you can take the effort out of your marketing, bulk email and mobile SMS text message requirements with complete ease and total peace of mind.

Fast and reliable mail server. Compatible with any mail client. Lots of security and anti spam features. Multiple SMTP gateways for messages that cannot be delivered directly. Parameterized mailing lists

SMTP server program for Windows that lets you send email messages directly from your computer. Along with a mass mailer the program can be used as a relay server for sending newsletters, distributing messages to different mailing lists

Bullet-proof SMTP POP3 server software used by corporations and Internet Service Providers as an ultra fast and reliable mail server. Its security features and options let you prevent DDoS attacks and block SPAM. It is also ideal for laptop PC users

BarracudaDrive is the worlds most advanced remote access tool. Some of the highlights of BarracudaDrives many features are: SSL VPN client and server, Remote control PC software, Secure File Server, Web File Manager.

Fast and secure mail server. Compatible with any mail client. Lots of security and anti spam features. Multiple SMTP gateways for messages that cannot be delivered directly. Parameterized mailing lists.

Corporate SMTP Server is outgoing SMTP server program for large organizations that can be used along with virtually any mailer or email program. It is very simple, bullet-proof and it has a lot of security and antispam features and options.

AXIGEN Office Edition is a FREE mail server, providing (E)SMTP, POP3, IMAP4 and Webmail services for 5 users. AXIGEN offers centralized Web/CLI Admin, FREE support - available for Linux, FreeBSD, NetBSD, OpenBSD and Solaris.