What is the order of processing in the work queue? What is the work queue pipeline?

Introduction

This document describes the the Work Queue pipeline and provides details on where to find information related to the order of processing in the work queue on the Cisco Email Security Appliance (ESA).

What is the work queue?  What is the order of processing in the Work Queue?

The Work Queue is where the received message is processed before it moves to the delivery phase. Processing includes masquerading, routing, filtering, safelist/blocklist scanning, anti-spam and anti-virus scanning, file reputation scanning and analysis, Outbreak Filters, and quarantining. For full information in regards to order processing in the work queue and complete understanding of the work queue pipeline, see the "Work Queue / Routing" chapter of the User Guide for the version of AsyncOS for Email Security that matches your ESA.

The order of processing of the Work Queue is dependent upon which revision of AsyncOS for Email Security is running on the ESA. Each revision has the capability to have newer services running. For full information in regards to order processing in the work queue and complete understanding of the work queue pipeline, see the "Understanding the Email Pipeline" chapter of the User Guide for the version of AsyncOS for Email Security that matches your ESA.

For example, the order of processing of the Work Queue for AsyncOS 9.7 for Email Security is shown in this diagram:

Related Information

• Cisco Email Security Appliance - End-User Guides
• Technical Support & Documentation - Cisco Systems