Best 10 mail servers

Here are 10 popular and highly-regarded mail servers, in no particular order:

1. Postfix: A widely-used, open-source mail transfer agent (MTA) that's known for its reliability, security, and ease of use.
2. Exim: Another popular open-source MTA that's known for its flexibility, scalability, and customization options.
3. Sendmail: A classic, open-source MTA that's been around for decades and is still widely used today. It's known for its reliability and security.
4. Qmail: A secure, open-source MTA that's designed to be more secure and reliable than traditional MTAs. It's known for its robust spam filtering and virus scanning capabilities.
5. Zimbra: A commercial mail server that's known for its ease of use, scalability, and advanced features like calendar and collaboration tools.
6. Microsoft Exchange: A popular, commercial mail server that's known for its robust features, scalability, and integration with other Microsoft products.
7. OpenSMTPD: A modern, open-source MTA that's designed to be more secure and easier to use than traditional MTAs. It's known for its robust spam filtering and virus scanning capabilities.
8. Mailhog: A popular, open-source mail server that's designed for development and testing environments. It's known for its ease of use and robust features like email logging and filtering.
9. Mailserver: A commercial mail server that's known for its ease of use, scalability, and advanced features like spam filtering and virus scanning.
10. iRedMail: A popular, open-source mail server that's designed for Linux and Unix systems. It's known for its ease of use, scalability, and advanced features like spam filtering and virus scanning.

When choosing a mail server, consider the following factors:

• Security: Look for a mail server that has robust security features, such as encryption, authentication, and spam filtering.
• Scalability: Choose a mail server that can handle a large volume of email traffic and can scale as your organization grows.
• Ease of use: Consider a mail server that's easy to set up and manage, with a user-friendly interface and robust documentation.
• Customization: Look for a mail server that allows for customization and configuration to meet your organization's specific needs.
• Integration: Consider a mail server that integrates with other applications and services, such as calendar and collaboration tools.

Ultimately, the best mail server for your organization will depend on your specific needs and requirements. Be sure to research and evaluate each option carefully before making a decision.