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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
  • 871 Views
  • 2 replies
  • 0 Helpful votes

anyone out there have this working correctly? We have had a few cases with CIsco as well as Duo. Find it hard to believe this isn't better documented. DUO DAG is configured and we have tried multiple iterations of versions as well as modifications. S...

cbehr by Level 1
  • 1708 Views
  • 1 replies
  • 0 Helpful votes

Hello.I have a question regarding a cluster of cisco esa appliances and behaviour of syslog forwarding (whether it's worsk as designed or possibly a bug/issue) we have a cluster of 2 cisco esa. on cluster level they have a syslog forwarder configured...

Thom89 by Level 1
  • 3388 Views
  • 3 replies
  • 5 Helpful votes

I want to implement CRES in my company, and I have the following questions:1) Does the CRES feature need a license? What is it called a license? How does the consumption of CRES licenses work?2) Is the initial step still this?Send an email to stg-cre...

Time wrong on my ESAesMy EA is saying that it's Wed Sep 01 04:35:17 2021 GMT but it's 11:08 am..the primary BTP server is set up correctyly and is keeping tiem with all our other servers just fine...for Time Zone Rules at system_administration/system...

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 Level 1
  • 3228 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?