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TCP/IP-channel-specific options: DISABLE_STATUS (0 or 1)

The MTA's SMTP server implements a private command XSTA. This command returns status information about the number of messages processed and currently in the MTA channel queues, status information about current associations (TCP/IP connections), and status information about LDAP lookup caching. Releasing such information may constitute a breach of security for some sites. Settting the SMTP server option DISABLE_STATUS to 1 disables the XSTA command, so that the SMTP server responds with

550 5.7.0 XSTA command has been disabled. 

The default is 0, which enables the XSTA command. In 8.0, the default has changed to 1, disabling the XSTA command.

SMTP server probes of the PORT_ACCESS mapping table can enable use of XSTA (overriding a more general DISABLE_STATUS=0 setting) for connections from particular source IPs (e.g., the host itself,, and particular administrator systems) via the (new in Messaging Server 7.0) $V flag.

See also: