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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.

 

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Migrate from Secure Email Virtual C100V to Avoid McAfee-Related Issues

  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
  • 880 Views
  • 2 replies
  • 0 Helpful votes

ESA - text resource

Hello,  I have a customer that is using "text resource".  This seems to burden the system or att least the text resource feature. Does anybody have the same problem?  

maraz by • Level 1
  • 1863 Views
  • 3 replies
  • 0 Helpful votes

Resolved! ESA Sytem Messages

Does anyone know what doc or where I can find a list of system messages specifically for Cisco ESA's?  I need to import them into a SIM and I need the list for parsing and alerting setup.  Can't seem to find this. Thank you, 

billbray by • Level 1
  • 2276 Views
  • 2 replies
  • 0 Helpful votes

Hiding the message content and sending exchange server failure notification massage to the mail sender

I have a cluster between C190 and C100v and we are runing version 11.0.0.264. I have the following two issues: When I login as an admin and open the spam quarantine table or policy quarantine table and see the message details I am able to see the me...

Resolved! Easiest way to block email from *@*.us

I wanted to add *@*.us to our dictionary called blocked senders which for the most part has just e-mail addresses in it.Reason is there has been an increase in spam from a random address@random.us.  To examples are adtauthorizeddealer@phyner.us and a...

Resolved! Migrating Asyncos 8 to 9

One of the major changes between 8 and 9 is in the handling of mail policies, which can now be a lot more sophisticated. My question is regarding the migration of a policy with a large list of senders; in a couple of cases my policies have over 100 d...

exMSW4319 by • Level 3
  • 1967 Views
  • 1 replies
  • 0 Helpful votes
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