Windows free mail server

Here are some popular Windows-based free mail servers:

1. OpenSMTPD: A free and open-source mail server that is easy to set up and configure. It supports SMTP, POP3, and IMAP protocols.
2. Postfix: Another popular open-source mail server that is widely used. It supports SMTP, POP3, and IMAP protocols, and is highly customizable.
3. Sendmail: A free and open-source mail server that is widely used. It supports SMTP, POP3, and IMAP protocols, and is highly customizable.
4. HMailServer: A free and open-source mail server that is designed for Windows. It supports SMTP, POP3, and IMAP protocols, and has a user-friendly interface.
5. Mercury/32: A free and open-source mail server that is designed for Windows. It supports SMTP, POP3, and IMAP protocols, and has a user-friendly interface.
6. Zimbra: A free and open-source mail server that is designed for Windows. It supports SMTP, POP3, and IMAP protocols, and has a user-friendly interface.
7. MailEnable: A free and open-source mail server that is designed for Windows. It supports SMTP, POP3, and IMAP protocols, and has a user-friendly interface.

Here are some key features to consider when choosing a Windows-based free mail server:

• SMTP, POP3, and IMAP support: Make sure the mail server supports the protocols you need.
• User management: Look for a mail server that allows you to create and manage user accounts easily.
• Security: Consider a mail server that has built-in security features, such as encryption and authentication.
• Customization: Choose a mail server that allows you to customize settings and configurations to suit your needs.
• Scalability: Consider a mail server that can handle a large number of users and emails.

Before installing a mail server, make sure you have a good understanding of the technical requirements and configuration options. It's also a good idea to test the mail server with a small group of users before deploying it to a larger audience.