Cisco Secure Email Gateway
| Product Type | Email Security |
|---|---|
| Status | Available Order |
| Series Release Date | 30-JAN-2009 |
|
Supported Models: - Cisco Secure Email Gateway C195 - Cisco Secure Email Gateway C395 - Cisco Secure Email Gateway C695 |
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- US/Canada 800-553-2447
- Worldwide Support Phone Numbers
- All Tools
Feedback
Feedback- Getting Started with Cisco Secure Email Gateway:
- Email Threat Defense Guided Resources | Secure Email Protection Guided Resources
- Ask the Experts live sessions | Email Security training videos | Submit Email Messages to Cisco
- Enhance Your Existing Cisco Email Security: Free trials of new features for Cisco Email Security customers
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Key Information
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Recent Security Notices
- 15-Jan-2026
- 19-Feb-2025
- 07-Feb-2025
- 05-Feb-2025
- 05-Feb-2025
Document Categories
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Data Sheets and Product Information
- Email and Web Security Infographic (PDF - 508 KB)
- Cisco Registered Envelope Service AAG (PDF - 720 KB)
At-a-Glance
- Supporting Multiple Brands on the Cisco Registered Envelope Service
- Supporting Multiple Brands on the Cisco Registered Envelope Service Data Sheet (PDF - 1 MB)
Data Sheets
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Email Premier
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Awareness
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Email Intelligent MultiScan (IMS)
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Email Phishing Defense (TnC & SaaS Subscription)
- End-of-Sale and End-of-Life Announcement for the Cisco Agari Domain Protection TnC and SaaS
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Email Virtual Appliance C000v & M000v
- End-of-Sale and End-of-Life Announcement for the Cisco Email, Web and Security Management x90 Hardware Appliances
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Cloud Mailbox Defense SKUs (Product still orderable via ETD-SEC-SUB under new brand name Email Threat Defense)
- End-of-Sale and End-of-Life Announcement for the Cisco ESA 14.2.x & 13.0.X & SMA 14.2.x releases
- End-of-Life Announcement for the Cisco CRES Outlook Plugin
- End-of-Sale and End-of-Life Announcement for the Cisco Email and Security Management x95 Hardware Appliances
- End-of-Sale and End-of-Life Announcement for the Cisco ESA 14.0, 14.0.1, 14.0.2 & SMA 14.0, 14.1 releases
- End-of-Sale and End-of-Life Announcement for the Cisco ESA 13.5.x,13.7 & SMA 13.0.x,13.5.x,13.6.x releases
- End-of-Sale and End-of-Life Announcement for the Cisco Secure Email Term SKU’s
- End-of-Sale and End-of-Life Announcement for the Cisco Email Product Bundles Under EMAIL-SEC-SUB and L-CES-SUB
End-of-Life and End-of-Sale Notices
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Security Notices
- Field Notice: FN - 64140 - Email Security Appliance (ESA) - Email Queue Corruption - Software Upgrade Required
Field Notices
- Reports About Cyberattacks Against Cisco Secure Email Gateway And Cisco Secure Email and Web Manager
- Cisco Secure Email Gateway Email Filter Bypass Vulnerability
- Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance Vulnerabilities
- Cisco Secure Email and Web Manager and Secure Email Gateway Cross-Site Scripting Vulnerability
- Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance SNMP Polling Information Disclosure Vulnerability
- Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance Stored Cross-Site Scripting Vulnerability
- Cisco Secure Email Gateway Server-Side Template Injection Vulnerability
- Cisco Secure Email Gateway Arbitrary File Write Vulnerability
- Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance Cross-Site Scripting Vulnerabilities
- Cisco Secure Email Gateway HTTP Response Splitting Vulnerability
- Cisco Secure Email Gateway, Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance Cross-Site Scripting Vulnerabilities
- Cisco Email Security Appliance and Cisco Secure Email and Web Manager Vulnerabilities
- Cisco Email Security Appliance, Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance Next Generation Management Vulnerabilities
- Cisco Email Security Appliance Denial of Service Vulnerability
- Cisco Email Security Appliance, Cisco Secure Email and Web Manager, and Cisco Secure Web Appliance Information Disclosure Vulnerability
Security Advisories, Responses and Notices
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Release and Compatibility
- Release Notes for AsyncOS 15.0.5 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 15.0.4 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 15.5.4 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 16.0.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 16.0.4 for Cisco Secure Email Gateway - MD (Maintenancel Deployment) (PDF)
- Release Notes for AsyncOS 15.5.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 15.0.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 15.0.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 15.5.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 16.0.3 for Cisco Secure Email Gateway - MD (Maintenancel Deployment) (PDF)
- Release Notes for AsyncOS 15.0.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment) (PDF)
- Release Notes for AsyncOS 16.0.2 for Cisco Secure Email Gateway - MD (Maintenancel Deployment) (PDF)
- Firmware Update for x95 Series Cisco Secure Email Gateway and Cisco Secure Email and Web Manager (PDF)
- Release Notes for AsyncOS 16.0.4 Hot Patch 1 for Cisco Secure Email Gateway (PDF)
- Release Notes for AsyncOS 15.5.3 Hot Patch 3 for Cisco Secure Email Gateway (PDF)
Release Notes
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Reference
- CLI Reference Guide for AsyncOS 16.0.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 15.0.4 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 16.0.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 15.5.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 16.0 for Cisco Secure Email Gateway - GD (General Deployment)
- CLI Reference Guide for AsyncOS 15.5.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 14.0.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 15.5.1 for Cisco Secure Email Gateway - GD (General Deployment)
- CLI Reference Guide for AsyncOS 15.0 for Cisco Secure Email Gateway - GD (General Deployment)
- CLI Reference Guide for AsyncOS 14.3 for Cisco Secure Email Cloud Gateway
- CLI Reference Guide for AsyncOS 14.2.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 14.2 for Cisco Secure Email Gateway - GD (General Deployment)
- CLI Reference Guide for AsyncOS 14.0.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 14.0.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- CLI Reference Guide for AsyncOS 14.0 for Cisco Secure Email Gateway - GD (General Deployment)
Command References
- Useful Links Cisco Email Security Appliance C195, C395, C695, and C695F
Documentation Roadmaps
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Design
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Install and Upgrade
- Cisco Secure Email Gateway and Secure Email and Web Manager Virtual Appliances on Public Cloud Platforms Deployment Guide (PDF)
- Cisco Secure Email Virtual Gateway and Secure Email and Web Manager Virtual Appliance Installation Guide (PDF)
- Cisco Email Security Appliance C195, C395, C695, and C695F Hardware Installation Guide
- Regulatory Compliance and Safety Information—Cisco Email Security Appliance C195, C395, C695, and C695F (PDF)
- Cisco Email Security Appliances C195, C395, C695, and C695F Getting Started Guide (PDF)
- Cisco x90 Series Content Security Appliances Installation and Maintenance Guide
- Cisco 380 and Cisco 680 Series Hardware Installation Guide (PDF)
- Welcome to the Cisco x70 Series Content Security Appliances (PDF - 607 KB)
- Welcome to the Cisco x90 Series Content Security Appliances (PDF - 607 KB)
- Welcome to the Cisco x80 Series Content Security Appliances (PDF - 607 KB)
- Cisco Email Security Appliance C690 Quickstart Guide (PDF)
- Cisco Email Security Appliance C390 Quickstart Guide (PDF)
- Cisco Email Security Appliance C190 Quickstart Guide (PDF)
- End-User Guides
- Release Notes for Configuration Migration Tool 1.0 for Cisco Content Security Virtual Appliances (PDF)
Install and Upgrade Guides
- Configure and Troubleshoot SWA, ESA and SMA Local Upgrade
- Upgrade SWA, ESA, SMA Locally
Install and Upgrade TechNotes
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Configuration
- Provision an Encryption Profile and Complete RES Account Setup for ESA
- Revert ESA and SMA to Original Configuration
- Automate Import and Export of Alias Configuration
- Configure Content Filter to Trigger Blank Subject Emails
- Configure DKIM Large Key Verification for Secure Email Gateway
- Configure Secure Email Gateway Outbound Relay Mode
- Configure Secure Email Gateway Outbound MTA-STS
- Configure Microsoft 365 with Secure Email
- Configure Email Encryption Add-in Using Microsoft O365
- Configure ESA to Skip Uploading Unknown MIME Type Files to File Analysis Server
- Configure Threat Scanner Per-Policy Scanning for SEG
- Configure Secure Email Gateway Per-Policy Journaling to Secure Email Threat Defense
- Configure TLSv1.3 for Secure Email Gateway
- Reset Cisco SEG/WSA Hardware to Factory Default Using Enablediag Console Access
- Automate or Script Configuration File Backup on SMA
Configuration Examples and TechNotes
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AsyncOS 16.x for Cisco Email Security Appliances
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AsyncOS 15.5 for Cisco Email Security Appliances
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AsyncOS 15.0 for Cisco Secure Email Gateway
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AsyncOS 14.2 for Cisco Secure Email Gateway
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AsyncOS 14.0 for Cisco Secure Email Gateway
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AsyncOS 13.7 for Cisco Email Security Appliances
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AsyncOS 13.5 for Cisco Email Security Appliances
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AsyncOS 13.0 for Cisco Email Security Appliances
Programming Guides
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Maintain and Operate
- User Guide for AsyncOS 16.0.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- Smart Licensing Deployment Guide for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager
- User Guide for AsyncOS 16.0.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 15.5.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 15.5.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 15.5.1 for Cisco Secure Email Gateway - GD (General Deployment)
- User Guide for AsyncOS 15.0.4 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 16.0.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 16.0 for Cisco Secure Email Gateway - GD (General Deployment)
- User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway - GD (General Deployment)
- User Guide for AsyncOS 14.2.3 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for Cisco Domain Protection (PDF)
- User Guide for AsyncOS 13.0 for Cisco Email Security Appliances - GD (General Deployment)
- User Guide for AsyncOS 14.0.2 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
- User Guide for AsyncOS 14.2.1 for Cisco Secure Email Gateway - MD (Maintenance Deployment)
End-User Guides
- Test Destination Controls in ESA Using Email Bombing
- Explain the File Analysis Client ID for Gateway, Cloud Gateway, and Email and Web Manager
- Best Practice Guide for Advanced Malware Protection (AMP) on Cisco Email Security
- Best Practice Guide for Anti-Spam, Anti-Virus, Graymail and Outbreak Filters
- Best Practice Guide for Bounce Verification and Destination Controls
- DANE for Email Security Appliance
- Alter the Methods and Ciphers Used with SSL/TLS on the ESA
- ESA Safelists/Blocklists Backup Procedure
- What are the key features for the Anti-Spam Engine on the Cisco Email Security Appliance (ESA)?
Maintain and Operate TechNotes
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Troubleshooting
- Reset Administrator Password and Unlock Administrator User Account
- Cisco Email Security Appliance (ESA) Anti-Spam Efficacy Checklist
Password Recovery
- Understand UNIX mbox Format Usage
- Find a Contract Number and Add Access to Your Contract Number
- Configure Transport Layer Security Version 1.0 on the ESA and CES
- Why Do I Receive Responses from the Cisco Registered Envelope Service "via CRES <mail_delivery@res.cisco.com>"?
- How Do I Set Up Multiple Company Logos on ESA and CRES?
- Restart and View the Status of Service Engines Enabled on ESA/CES
- ESA FAQ: How to allowlist recipient or sender emails
- How do I blocklist or drop a sending domain using Incoming Mail Policy and Content Filter?
- Can I allowlist or blocklist individual users via email addresses in the HAT?
- I have added the domain 'example.com' to the ACCEPTLIST sender group. Why is it not working?
- Proxy Cache Size on the WSA
- How to Use LDAP Accept/Routing Queries when Email Addresses Contain Separators?
- What Are the Current ESMTP Commands that ESA and CES Supports?
- ESA/SMA Virtual Deployment FAQ
- What Does "SBRS rfc1918" in the Mail Logs or Message Tracking Mean?
Support FAQ
- Activate Smart Licensing and Troubleshoot on ESA/SMA/WSA
- Troubleshoot "The File Reputation Service Is Not Reachable" Error on Cisco ESA
- Collect and Troubleshoot Packet Captures on Cisco ESA
- Troubleshoot vESA Unable to Download and Apply Antispam or Antivirus Updates
- Verify ESA and SMA Mail Queue Size and Message Capacity
- FAQ for Remote Access on Cisco ESA/WSA/SMA
- Troubleshoot Connection to URL Retrospective Registration Service Failed. Certificate Verification Failed.
- Troubleshoot Alert Message - Update Failed
- Troubleshoot Alert Message - an Application Fault Occurred
- Troubleshoot Email Encryption "Client Data Not Updated" Error
- Troubleshoot Alert Message - Upload Limit Reached
- Troubleshoot Alert Message - System Is Rate Limiting Envelope Sender
- Troubleshoot Alert Message - Disk Quota for Miscellaneous Services
- Response to Cisco Secure Email Gateway SMTP Smuggling Vulnerability Report
- Reinitialize a Certificate on an Email Security Appliance
Troubleshooting TechNotes
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