Best linux mail server 2019

As of 2019, some of the best Linux mail servers are:

1. Postfix: Postfix is a popular and widely-used mail transfer agent (MTA) that is known for its reliability, security, and ease of use. It is a good choice for small to medium-sized organizations.
2. Sendmail: Sendmail is another popular MTA that has been around for a long time. It is known for its flexibility and customization options, but can be more complex to set up and configure.
3. Exim: Exim is a powerful and feature-rich MTA that is known for its reliability and security. It is a good choice for large organizations or those with complex email requirements.
4. OpenSMTPD: OpenSMTPD is a modern and lightweight MTA that is known for its simplicity and ease of use. It is a good choice for small to medium-sized organizations.
5. Qmail: Qmail is a secure and reliable MTA that is known for its ease of use and customization options. It is a good choice for small to medium-sized organizations.

In addition to the MTA, you will also need to consider the following components:

1. Mail Delivery Agent (MDA): An MDA is responsible for delivering email to the user's mailbox. Popular MDAs include Procmail, Maildrop, and Sieve.
2. Mail User Agent (MUA): An MUA is responsible for allowing users to send and receive email. Popular MUAs include Thunderbird, Evolution, and Outlook.
3. Authentication and Authorization: You will need to set up authentication and authorization mechanisms to ensure that only authorized users can send and receive email.

Some popular Linux distributions for running a mail server include:

1. Ubuntu: Ubuntu is a popular and user-friendly Linux distribution that is well-suited for running a mail server.
2. CentOS: CentOS is a stable and reliable Linux distribution that is well-suited for running a mail server.
3. Debian: Debian is a popular and stable Linux distribution that is well-suited for running a mail server.
4. Fedora: Fedora is a cutting-edge Linux distribution that is well-suited for running a mail server.

Some popular mail server configurations include:

1. Postfix with Dovecot: This is a popular and widely-used configuration that combines Postfix with Dovecot, a secure and reliable IMAP/POP3 server.
2. Postfix with Courier: This is another popular configuration that combines Postfix with Courier, a secure and reliable IMAP/POP3 server.
3. Exim with Cyrus: This is a popular configuration that combines Exim with Cyrus, a secure and reliable IMAP/POP3 server.

Ultimately, the best Linux mail server for you will depend on your specific needs and requirements. I recommend doing some research and testing different configurations to find the one that best suits your needs.