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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
  • 876 Views
  • 2 replies
  • 0 Helpful votes

Hi,  We have hosted mx records for our main domain "abc.com" and mails are successfully received by the **bleep** gateway. We are planning to use same **bleep** gateway for one of our sub domain (x.abc.com) as well which belongs to our company's subs...

Lahirud by Level 1
  • 1277 Views
  • 3 replies
  • 0 Helpful votes

I have configured our devices to send logs via syslog push. When the logs arrive, the hostname is not shown. When I select the option to append a hostname then save the settings, it does not reflect that change when I look back at it. How can I make ...

Hi , we are planning to move from on premises proof point to Cisco Cloud **bleep** and have below inquiries need to be answered please: . We have two domain lets say domain one is abc.com and domain two is xy.abc.com can we have both donain configure...

M_alamin by Level 1
  • 481 Views
  • 1 replies
  • 0 Helpful votes

Hi All, Need to configure an Cluster between Hardware device and Virtual appliance and later will remove the Hardware appliance. Before jumping into configuration i have a some query. 1. Is it sma required after forming an cluster to manage the devic...

Vishal6 by Level 3
  • 1811 Views
  • 13 replies
  • 0 Helpful votes

Hello all,Does someone know when TLSv1.3 will be available in Cisco CES (cloud)? TLSv1.3 is been used for several years now, but cannot yet be configured in the ESA. We are waiting for the implementation of version 1.3, so we can meet the requirement...

Please, I would like to know the most recent replacement product for the Cisco Email Security Appliance C190, also in an appliance form

ihab-bm by Level 1
  • 1237 Views
  • 6 replies
  • 0 Helpful votes