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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
  • 783 Views
  • 2 replies
  • 0 Helpful votes

Hello, I am currently testing a message filter that scans for javascript tags in various html files and for that also with various archive files. Last time I checked there was no support for 7z files with the attachment-binary-contains, but my tests...

daro by Level 1
  • 1536 Views
  • 4 replies
  • 0 Helpful votes

Hi Team,In the CES console for the audit log there is no option for check the administrative activities carried out to check what changes has been made by an administrative user. As per my research cisco.com it is not a configurable option.Can you pl...

ymadheka by Level 4
  • 3100 Views
  • 4 replies
  • 0 Helpful votes

Hi, we received multiple mails with HTML attachments containing paypal or other  banking phishing attempts, please find attached the HTML file in question. please let me know if the original mail is needed too. Those mails probably should have been ...

daro by Level 1
  • 2258 Views
  • 3 replies
  • 0 Helpful votes

Resolved! URL Reputation

Hello, I am looking into using the URL Reputation for my inbound email.  I have in enabled but not taking any action at this time.  Is there a way to see what a specific email scored for URL reputation on the -10.0 to 10.0 scale? Thanks! Shawn

Hi Team,In the CES console when the AMP is not able to scan the attachment there is action of Deliver or Drop, customer wants to have quarantine action for these mails. As per my research cisco.com it is not a configurable option.Can you please advis...

ymadheka by Level 4
  • 1270 Views
  • 3 replies
  • 0 Helpful votes

Hi there,  when an email is undeliverable for one reason or another (unknown address invalid recipient, etc) I'd like to be able to include more information to the original sender.   Currently they get back: The following message to <user@email.com> ...

Wanted to upgrade my appliances but I have some concerns about performance. In the release notes there is a Performance Advisory:   RSA Email DLP • Enabling RSA Email DLP for outbound messages on an appliance that is already having anti-spam and anti...

mmonocchi by Level 1
  • 829 Views
  • 1 replies
  • 0 Helpful votes