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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
  • 1500 Views
  • 2 replies
  • 0 Helpful votes

Our current setup is Ironport relay email to exchange and vice versa, management has come with new solutions trendmicro DDEI they want all inbound mail to go from Ironport -> trendmicro -> exchange and outbound email exchange -> ironport .Currently w...

tanwer by Frequent Visitor
  • 524 Views
  • 2 replies
  • 0 Helpful votes

Hi All, let me first try to schematize our setup :   O365 TENANT --> LINUX POSTFIX ( for sender based routing ) --> CISCO ESA ( DKIM signing )--> OUTSIDE WORLD   When a mail is sent from one of our email domains in our O365 tenant ( and DKIM signing ...

rolelael by Level 3
  • 11618 Views
  • 13 replies
  • 0 Helpful votes

I'm looking for help as to how to format the Post request to test our API connectivity to one of our CES Gateway servers. Cisco support have ensured that this is enabled, although we are not able to view the interfaceconfig ourselves. I am following ...

Hello community,  we have HW cisco with HW Threat grid integration. The problem that we have is when the file is send for analysis the message is quarantined in File quarantine. I checked that the Threat grid needs 5-10 min to finish the analysis, af...

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