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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
  • 1158 Views
  • 2 replies
  • 0 Helpful votes

I am testing geo-location in a message filter and cannot seem to get this to work. Here is my filter:geo_test: if (geolocation-rule (['United States'])){log-entry('us');} When I test this with trace using a google ip in the US, 209.85.221.46, it show...

Hello We need to block in our ironport nested compressed/archived filesfor example: zip files that include zip filesor zip inside zip inside zip etc ... what is the way to do this? we built this content filter but need to complete it to accomplish th...

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AbedB by Frequent Visitor
  • 3334 Views
  • 6 replies
  • 5 Helpful votes

Hi everyone, We are migrating cisco ESA to CES. We started manually mirroring the policies, HATs, RATS, Dictionaries, etc. My question is what are the prerequisites for the SMTP routes since the mail servers are hosted in a private IP addresses?

Hi all, Hope you all are doing great. Not sure if this is the correct location, feel free to move the question to another location if not.I am currently in the process of migrating a physical appliance with AsyncOS v.7 to a virtual appliance with Asy...

Rick187 by Community Member
  • 2128 Views
  • 1 replies
  • 5 Helpful votes

Resolved! mta-sts

Hi, please correct me if I am wrong: Cisco ESA doesn't support mta-sts? For example: to configure policy ESA has to check and follow mta-sts policy published by the recipient? If I am correct is there any plan in the roadmap to enable mta-sts?Tnx,Jer...