Bulk mail server open source

Here are some popular open-source bulk mail servers:

  1. Postfix: A widely used, highly configurable, and scalable mail server that can handle large volumes of email. It's available for Linux and Unix-like systems.
  2. Sendmail: Another popular open-source mail server that's been around for decades. It's known for its flexibility and customization options.
  3. OpenSMTPD: A modern, open-source mail server that's designed to be secure and easy to use. It's available for Linux, macOS, and Windows.
  4. Exim: A highly configurable and customizable mail server that's been around for over 20 years. It's available for Linux and Unix-like systems.
  5. Qmail: A secure and reliable mail server that's designed to be easy to use and configure. It's available for Linux and Unix-like systems.
  6. Mailman: A popular open-source mailing list manager that can handle large volumes of email. It's available for Linux and Unix-like systems.
  7. SquirrelMail: A web-based email client that can be used as a bulk mail server. It's available for Linux and Unix-like systems.
  8. Zimbra: A popular open-source collaboration suite that includes a mail server. It's available for Linux and Unix-like systems.
  9. OpenDKIM: An open-source implementation of the DKIM (DomainKeys Identified Mail) protocol, which helps prevent email spam and phishing.
  10. OpenSPF: An open-source implementation of the SPF (Sender Policy Framework) protocol, which helps prevent email spam and phishing.

Some popular open-source bulk mail server software that's specifically designed for sending large volumes of email includes:

  1. Mailgun: A popular open-source bulk mail server that's designed for sending large volumes of email. It's available for Linux and Unix-like systems.
  2. Sendgrid: Another popular open-source bulk mail server that's designed for sending large volumes of email. It's available for Linux and Unix-like systems.
  3. Postmark: A popular open-source bulk mail server that's designed for sending large volumes of email. It's available for Linux and Unix-like systems.

When choosing an open-source bulk mail server, consider the following factors:

  1. Scalability: Can the server handle large volumes of email?
  2. Security: Does the server have built-in security features to prevent spam and phishing?
  3. Customizability: Can the server be customized to meet your specific needs?
  4. Ease of use: Is the server easy to set up and configure?
  5. Community support: Is there a large community of users and developers who can provide support and help with troubleshooting?

Remember to always follow best practices for sending bulk email, including obtaining consent from recipients and complying with anti-spam laws.