Email Security

cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

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

Hello, since about 17:20 (GMT+1) August 17 we been getting this error :Unable to connect to the Cisco Aggregator Server.Details: No valid SSL certificate was sent.Anyone else run into this issue ?

Komaneko by Level 1
  • 1869 Views
  • 9 replies
  • 2 Helpful votes

Hello All, Need help on below points Integration of CES CLI and GUI Login with SAML SSO using Microsoft Azure AD I'm in the process of integrating CES CLI and GUI login (cluster of 8 instances) with SAML SSO using Microsoft Azure AD. I'm referring to...

Vishal6 by Level 3
  • 1225 Views
  • 9 replies
  • 0 Helpful votes

I am moving for a C000V to C100V I have the VM up and running but when a loadlicense I get: You could not load the license file in the appliance because it did not contain a cloud feature key. You can retry to load the license file with a cloud featu...

KevinKRoy by Level 1
  • 672 Views
  • 2 replies
  • 0 Helpful votes

Hello,The IP address that my client is using to send has been listed as "Spam Level - Critical"I made a ticket to ask for the reputation to be adjusted, but was denied with them saying the following:"RESOLVED_CLOSED : UNCHANGED - Our worldwide sensor...

Hello there - we are working with a C300V. For the past couple of months my system has been delaying relays from 1800-ish to 6:30-ish.  Logs show it gets delayed: 4.3.1 - Mail System full, however regular mail moves just fine, and this is occurring e...

AOpstein by Level 1
  • 915 Views
  • 3 replies
  • 0 Helpful votes