Postfix (EN)

Definition

Postfix is a widely used open-source mail transfer agent (MTA) responsible for sending and receiving emails. It was developed as a more secure and powerful alternative to Sendmail and is characterized by its modular architecture. Postfix is included in many email server installations, including the Mailcow solution, and supports various security features such as TLS encryption and authentication methods. Its configuration is done through text files, making it flexible and customizable.

Architecture

flowchart TD     A[MUA] -->|SMTP/IMAP| B[Postfix MTA]     B --> C[Postfix Queue]     C --> D[Postfix Delivery]     D --> E[Remote MTA]     D --> F[Mailbox]     G[Spamfilter] -->|Spam| F     H[Virenscanner] -->|Viren| F     B -->|TLS| I[Zertifikat]     B -->|SASL| J[Benutzerdatenbank] 

Im Kontext

• Wird typischerweise zusammen mit Dovecot (IMAP/POP3-Server), SpamAssassin und ClamAV (Virenscanner) verwendet
• Verwandt zu: Sendmail, Exim, Qmail, Dovecot
• Beispiel-Einsatz: Als zentrale Komponente in E-Mail-Server-Lösungen wie Mailcow, iRedMail oder ISPConfig