Postfix is a mail transfer agent designed around security, reliability and straightforward administration. Its modular architecture separates major mail-processing functions into different programs with restricted privileges.
It can operate as an Internet-facing SMTP server, relay host or local mail transport system. Postfix provides extensive controls over message routing and delivery while integrating with external authentication, filtering, directory and database services.
The software is widely deployed on Linux and other Unix-like operating systems and can replace Sendmail while retaining compatibility with many traditional mail-system interfaces.
This is free and open source software.
Key Features
- SMTP server and client functionality.
- Flexible address rewriting, aliases and message routing.
- SMTP authentication through SASL implementations including Cyrus SASL and Dovecot.
- TLS encryption and certificate-based authentication.
- DANE support for authenticated SMTP transport.
- REQUIRETLS support.
- IPv6 support.
- LMTP client support.
- Milter interface for integrating mail filters.
- Policy delegation to external services.
- postscreen service for protecting Internet-facing SMTP servers from abusive clients.
- Virtual domains and virtual mailbox delivery.
- Header and body inspection facilities.
Website: www.postfix.org
Support:
Developer: Wietse Venema and contributors
License: IBM Public License 1.0 / Eclipse Public License 2.0
Postfix is written in C. Learn C with our recommended free books and free tutorials.
Related Software
| Email Servers | |
|---|---|
| Exim | Highly configurable mail transfer agent |
| OpenSMTPD | Implementation of the server-side SMTP protocol with additional extensions |
| mox | Modern, secure, all-in-one email server |
| DBMail | Enables storing and retrieving mail messages from a database |
| WildDuck | Opinionated email server |
| Stalwart | All-in-one mail and collaboration server |
| Mailu | Self-hosted mail server stack |
| Mail-in-a-Box | Self-hosted email server solution |
| Postfix | Popular mail transfer agent |
| Maddy | Composable all-in-one mail server |
| Haraka | Modern SMTP server |
| Dovecot | Secure POP3 server that supports mbox and maildir mailboxes |
| Courier | Integrated mail/groupware server |
| Cyrus IMAP | Email, contacts and calendar server |
| Zimbra | Zimbra Collaboration Suite |
| Modoboa | Mail hosting and management platform |
| Citadel | Exchange-killer groupware server |
| chasquid | SMTP server with a focus on simplicity, security, and ease of operation |
| Sendmail | Mail transfer agent for sophisticated mail configurations |
| dma | DragonFly Mail Agent |
| DavMail | POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway |
Read our verdict in the software roundup.
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