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Important Announcements

Cisco Secure Email Add-Ins No Longer Supported on Microsoft Outlook 2019

This is to inform you that, effective October 14, 2025, Microsoft Outlook 2019 is no longer supported for the Secure Email Encryption Service Add-In and Secure Email Submission Add-In.

To continue using these Add-Ins, we recommend upgrading to Microsoft 365. Starting October 2025, download and install the new manifest for:

- Secure Email Encryption Service Add-In from the CRES Admin Dashboard

- Secure Email Submission Add-In from the Cisco Software Download Portal

After downloading the manifests, follow the instructions provided in the Submission and Encryption Add-In guides. For more information, see: Cisco Email Encryption - End-User Guides.

TLS 1.0/1.1 Deprecation from AsyncOS for Secure Email Gateway, Starting version 16.5

We would like to inform you that starting with the AsyncOS 16.5 release, TLS versions 1.0 and 1.1 will no longer be available as configuration options in both the CLI and GUI.

To ensure secure email delivery and receipt, you should use TLS versions 1.2 and 1.3. These versions can be configured via the sslconfig CLI command or through the System Administration > SSL Configuration menu in the user interface.

For detailed instructions on updating TLS versions, please refer to the “System Administration” section of the User Guide for AsyncOS 16.0.x for Cisco Secure Email Gateway.

 

Forum Posts

  Important: Migrate from Secure Email Virtual C100V Models to Avoid McAfee-Related Issues Dear Valued Customer, We are reaching out to ensure your Cisco Secure Email environment continues to operate at optimal performance and reliability. As worklo...

dmccabej by Cisco Employee
  • 346 Views
  • 2 replies
  • 0 Helpful votes

In our paid penetration test our vendor recommended the following: Create a filter that will inspect the message body of an email and compare a link's text to the URL in the link's HTML tag. If there is a difference, prepend a message to the message ...

A filter detects incoming messages with credit card numbers. The notification text explains why it was rejected, etc. However, the message comes from "Mail Delivery System <noreply@ces.cisco.com>". Is there a way to specify for this filter / notifica...

It's been several years since I assisted with a CES deployment but if I remember correctly Cisco instantiate the instance in their cloud data centers. My question is what version of AsyncOS is currently being deployed in Cloud Email Security, 12.x or...

andrew333 by Level 4
  • 2198 Views
  • 2 replies
  • 0 Helpful votes

Attempting to deploy Email Encryption 1-2-1-158. We ran through the mass deployment tool with our Cisco admin and created a package to download. When testing the install, we see that our custom configuration seems to be working, but when clicking on ...

JoE5005 by Level 1
  • 1651 Views
  • 1 replies
  • 0 Helpful votes

Hi - We currently have a slew of public facing email addresses that route to our internal mail server for agents to handle.  We're going to move this process to the salesforce cloud and were provided one-to-one new address to redirect to:  example Cu...

KTD1 by Level 1
  • 1415 Views
  • 1 replies
  • 5 Helpful votes
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