Website: postfix.org
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Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. It is known for its security, reliability, and performance. Postfix was originally developed by Wietse Venema at the IBM T.J. Watson Research Center in the 1990s. It is released under the IBM Public License 1.0, which is a free software license. Postfix is widely used as an MTA for Unix-like operating systems. Key Features: Security: Postfix is designed with a strong emphasis on security. It has a built-in access control mechanism and supports various authentication methods, including SMTP AUTH and TLS encryption. Reliability: Postfix is known for its robustness and stability. It has a modular architecture that allows for easy troubleshooting and maintenance. Performance: Postfix is optimized for high-performance mail delivery. It can handle a large volume of email traffic efficiently. Flexibility: Postfix is highly configurable and supports a wide range of mail delivery scenarios. It can be used as a mail gateway, a mail relay, or a mail server for a single domain. Scalability: Postfix is suitable for both small and large-scale mail systems. It can be deployed in a variety of environments, from personal email servers to enterprise-level mail infrastructure. Open Source: Postfix is distributed under an open-source license, which means that its source code is freely available for inspection, modification, and redistribution. Active Community: Postfix has a large and active user community. This means that there is a wealth of documentation, tutorials, and user forums available for support. Postfix is often compared to other popular MTAs, such as Sendmail and Exim. It has gained a reputation for being easier to configure and more secure than Sendmail, which was the dominant MTA in the Unix world before Postfix's rise in popularity. Overall, Postfix is a versatile and reliable choice for handling email transport. Its focus on security and performance makes it a preferred option for many organizations and individual users."