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Zimbra SMTP to Amavis
This port is commonly used within Zimbra Collaboration Suite for internal communication between the mail transfer agent (Postfix) and Amavis, an open-source content filter. It facilitates email scanning, virus filtering, and spam detection before mail delivery, ensuring cleaner email flows within an organization’s email infrastructure..
Port 10024 is primarily used in the Zimbra Collaboration Suite, an open-source email and collaboration platform. Within Zimbra, this port serves for internal SMTP traffic between Postfix (the mail transfer agent) and the Amavis content filter. When Postfix receives an email, it forwards it over TCP port 10024 to Amavis for content scanning.
Amavis integrates antivirus and antispam tools, scanning the emails for malware, viruses, and unsolicited messages. Accepted mails are then handed back from Amavis to Postfix through a separate port for final delivery to the mailbox or onward routing. This separation ensures that incoming emails are filtered thoroughly before users engage with them.
Typically, this port operates internally within the server or trusted LAN environments, rather than being exposed externally. Proper functioning requires that both Postfix and Amavis are configured correctly to send and receive messages on port 10024, maintaining seamless scanning and delivery workflows within Zimbra’s architecture.