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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
  • 1595 Views
  • 2 replies
  • 0 Helpful votes

Get the following warning as mail alert, but can' find anything in Log-Files:The mcafee was restarted due to an error. A debug file was generated for troubleshooting. Please contact your authorized support center.Does anyone knows, what to do? 

Boernsel by Community Member
  • 1136 Views
  • 1 replies
  • 0 Helpful votes

Dear all. I configured url filtering and added -5 -3 (Custom Range) for Suspected url. But some emails (with legitimate urls inside it) get blocked by esa due to newly created suspected url content filter. Could you please tell me how can I see the e...

On our Email Security Appliances we're having the following challenge, with our own company's marketing emails being tagged. Under Mail Policies > Graymail settings, I have selected "Action on Marketing email" to prepend [MARKETING SPAM] to newslette...

Hi Team,I have done an upgradation from 14.2.1-020 to 15.0.0 build 104 and after that facing an Error "Connection to Url retrospective service failure due to invalid certificate". Please find attached snap and let me know how can i resolve this.    

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sv7 by Level 5
  • 8423 Views
  • 14 replies
  • 0 Helpful votes

Hello all, hope you can help me to get a bit further in this case. Version 16 of the ESA Cluster. So i have implemeted DMARC / DKIM /SPF  from internal mails which sended in our SPF IPs hosts. Currently to check as we have it as new feature with none...

Hello,People can send me emails sometime and I can see that TLS 1.3 was in place, some time same sender is not able to send me email  and get this bounce back alert"The following message to *@domain.com was undeliverable.The reason for the problem:5....

KhanSb by Community Member
  • 814 Views
  • 3 replies
  • 0 Helpful votes