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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
  • 1520 Views
  • 2 replies
  • 0 Helpful votes

Hello All, Deployed an Cloud Email Security in my premises where incoming mails goes via ESA and then delivered to my Microsoft Mx. Here im facing an issue where  my mail goes to Spam folder due to SPF fail. Attaching an Error snapshot for better cla...

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sv7 by Level 5
  • 898 Views
  • 3 replies
  • 0 Helpful votes

Hello, .The hostname of the equipment does not appear in the Syslog export. This problem is observed with versions 14.2.1-020 and 14.0.0-698  The platform is a C600v. Have you ever faced this issue? Is there a way to add it? Best Regards,        

jds5 by Level 5
  • 1310 Views
  • 5 replies
  • 0 Helpful votes

Hi all!We integrated our Gsuite with CES , and we are facing some problems with forwarding, routing rules and groups.It looks like those emails are looping back to the CES and marked as spoofs.... (because the sender is from our domain..)Is anyone el...

yshen by Community Member
  • 756 Views
  • 0 replies
  • 0 Helpful votes

Resolved! Cluster esa

Hi all,I need to create a cluster for c195 devices so, I would like to known which are step to do it.I never done it and I would like to know which are requirement to do it.Someone could help me to do it ? Many tks in advanced.Rgds

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