List of free mail servers

Here is a list of free mail servers that you can use:

  1. OpenSMTPD: A free and open-source mail server that is easy to set up and configure. (https://opensmtpd.org/)
  2. Postfix: A popular and widely-used free and open-source mail server that is highly customizable. (https://www.postfix.org/)
  3. Sendmail: Another popular and widely-used free and open-source mail server that is highly customizable. (https://www.sendmail.com/)
  4. Exim: A free and open-source mail server that is known for its reliability and security. (https://www.exim.org/)
  5. Qmail: A free and open-source mail server that is known for its security and reliability. (https://www.qmail.org/)
  6. Mail-in-a-Box: A free and open-source mail server that is easy to set up and configure, and includes a web interface. (https://mailinabox.email/)
  7. Mailcow: A free and open-source mail server that is easy to set up and configure, and includes a web interface. (https://mailcow.email/)
  8. iRedMail: A free and open-source mail server that is easy to set up and configure, and includes a web interface. (https://www.iredmail.org/)
  9. Zimbra: A free and open-source mail server that is known for its ease of use and scalability. (https://www.zimbra.com/)
  10. SquirrelMail: A free and open-source web-based mail client that can be used as a mail server. (https://squirrelmail.org/)

Please note that while these mail servers are free, they may have limitations and requirements, such as:

It's also important to note that some of these mail servers may have specific requirements, such as a dedicated IP address or a specific operating system, so be sure to check the documentation and requirements before setting up a mail server.