In an Email Firewall Rule, the “Stop Other Rules…” disposition:

The "Stop Other Rules..." disposition in a Proofpoint Email Firewall rule is a processing control mechanism. When a message meets the conditions of a rule with this disposition, Proofpoint ceases to evaluate any subsequent rules within that same module (in this case, the Email Firewall). The message is then passed to the next processing module in the sequence (e.g., Spam Detection, Virus Detection). This is used to create an explicit exception or to ensure a specific action is taken without being overridden by a later rule in the same list, thereby improving processing efficiency and preventing conflicting rule logic.

A. This describes a quarantine action. "Stop Other Rules..." is a flow-control disposition and does not, by itself, send a message to the quarantine.

C. This is incorrect because the scope of this disposition is limited to the current module only (the Email Firewall), not all subsequent processing modules.

D. This describes the "Discard" disposition. The "Stop Other Rules..." disposition affects rule processing flow, not the final delivery state of the message.

1. Proofpoint Protection Server 8.18 Administrator Guide

Chapter 5: Email Firewall

Section: "About Email Firewall Rules

" Subsection: "Dispositions." The guide specifies that this disposition "stops processing subsequent rules in the Email Firewall module for this message. The message then continues to the next module in the processing pipeline." This confirms the action is module-specific.

2. Proofpoint On-Demand (PoD) Administration Courseware

Module: "Email Protection - Policy Enforcement." The training material explains rule processing order and explicitly states that the "Stop processing rules in this module" option is designed to terminate rule evaluation within the current policy set once a match is found

allowing the message to proceed to the next stage of filtering.