Cisco Email Security Appliance AsyncOS 9.1 Release Notes

This document details new features, behavior changes, upgrade paths, installation instructions, and known issues for Cisco Email Security Appliances running…


Cisco Email Security Appliance AsyncOS 9.1 Release Notes - cover page
Brand
Cisco
Category
Other Electronics
Document type
Other
Language
Chinese
Pages
8
File format
PDF
File size
449 KB
Published
13 October, 2026
Updated
13 October, 2026
MD5 checksum
9DFD2FBFE6D190B62CF1CCFB3CF2FA9A

About this manual

This release note covers the AsyncOS 9.1 software update for Cisco Email Security Appliances (ESA). Key additions include FIPS certification with integrated encryption modules and enhanced file analysis quarantine capabilities that allow automatic deletion or release of emails based on content security decisions.

The document provides critical information regarding behavior changes, such as new options to accept or reject mail based on subject size limits. It outlines the upgrade path from supported previous versions (e.g., 8.5.x) and lists specific hardware models compatible with this version, while noting that certain older hardware like C160 and X1060 are not supported. This manual is written in Chinese.

What's inside

  • New Features
  • Behavior Changes
  • Upgrade Paths
  • Installation Instructions
  • Hardware Support
  • Known Issues

Frequently asked questions

Which hardware models are supported by AsyncOS 9.1?

Supported hardware includes all virtual device models and specific physical models such as C380, C680, C170, and certain C370, C370D, C670, or X1070 devices.

Which hardware models are NOT supported by AsyncOS 9.1?

This version does not support the C160, C360, C660, and X1060 hardware models.

Can I upgrade directly from AsyncOS versions prior to 9.0?

No, if upgrading from a version other than the immediate previous one (major or minor), you must check all release notes between your current version and this one.

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