An easy to use Mail Server for Windows, Windows 7 and above.
Windows Mail Server is an advanced, secure and high performing mail server. With support for all standard mail protocols, including SMTP, POP3, IMAP4, LDAP and WebMail, the software can meet the needs of almost any business or home user. Windows Mail Server is fully scalable with support for unlimited users and domains, ODBC and clustering. The mail server also includes strong SPAM protection, on-server antivirus scanning, Content Filtering, IPv6 and much more.

Features and Edition Comparison
SMTP – Receive incoming mail. Secure your SMTP with options including SMTP Authentication, IP transfer limits and hop count limits.
POP3 – Use almost any mail client to read and reply to your mail.
IMAP4 – Advanced, synchronized access to your mail, allowing easier control over your accounts from multiple locations.
WebMail – Fully customizable access to your accounts via any web browser. Features include HTML composing, domain administration, SPAM control, custom filters, POP3 Retrievals, address books, signatures, auto-responses and more.
Automatic Sign-ups – Let new users sign up for an email account with WebMail. Run your own email service.
LDAP – Allow users to access shared address book information and allow other software to query the server for existing users.
Remote Admin – Remotely access your settings, user accounts and logs via any web browser.
Outgoing Mails – Handle your own outgoing mail with support for MX lookup based or direct relaying delivery methods.
Static Routing – Set up mail routing rules to help integrate multiple servers and customize mail routes for particular domains.
POP3 Retrievals – Automatically download mails from other mail servers into local accounts.
IPv6 Support – Run the server on both IPv4 and IPv6 networks.
Tarpitting – Block abusive clients and SPAM agents that try to deliver mail to non-existent addresses.
Grey List – Deflect potential SPAM delivery agents with an efficient SMTP tactic.
SPAM Trap – Detect and block SPAM agents with SPAM trap email addresses.
Real-time Black Lists (RBLs) – Further reduce SPAM with RBL online databases.
Bayesian SPAM Filter – Prevent SPAM with self learning Bayesian filtering technology.
Sender Policy Framework (SPF) Support – Detect return-path / sender address forgery and also reduce SPAM and virus mails.
Antivirus Protection – Protect users from viruses by integrating your mail server with almost any existing antivirus product.
Content Filtering – Set up rules to control your mail content, run applications, send new mail and much more.
256-bit SSL – Secure access to your mail with 256-bit SSL encryption.
Secure Login Methods – Protect your login details with SASL methods such as CRAM-MD5 or CRAM-SHA1.
Anti-Hammering – Protect user login details by preventing brute force attacks.
Mail Loops / Infinite Bounce Protection – Automated protection against mail loops and infinite bounce mails.
IP Restrictions – Secure your mail services using IP access rules.
Advanced Port Control – Complete control over how ports are opened and time-out values.
Domain Administrators – Allow users to administer their own domains through WebMail.
Mailing Lists – Send bulk mails to multiple email addresses and accounts. Opt-in mailing lists allow users to automatically add and remove themselves.
Redirection – Redirect incoming / outgoing mails to other email addresses.
Auto-Responses – Automatically send a mail in response to new incoming mail.
Alias Addresses – Assign multiple email addresses to a single account.
Front End SMTP – Use the software to simply protect your primary mail server.
Folder Hierarchies – Create nested folder hierarchies for use in IMAP4.
Catch-All Accounts – Set accounts to receive all misdirected incoming mail for a particular domain.
Shared Address Books – Manage shared address book information for use with WebMail and LDAP responses.
Message Control – Customize failure messages, warnings and service welcome messages.
Simple User Interface – Explorer style interface for faster and easier configuration management.
Setup Wizards – Quickly and easily configure the most essential parts of your mail server to get your mail server online in minutes.
Diagnostics – Check your system for configuration problems using new solution hints to help fix them.
True Multiple Domain Support – Hierarchically arranged ‘domain\group\user’ accounts with added support for alias and backup domains.
INI Based File System – Manage your settings and users externally by editing the setup files.
Clustering – Improve performance and manage large numbers of users using multiple mail servers. New faster and more load bearing accounts system.
ODBC – Store and control vital user information using an ODBC database. Integrate your mail server with other applications and web scripts.
Maximum User Accounts – The number of allowed individual user storage accounts.
Maximum Domains – The number of allowed domains.