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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 workloa...

dmccabej by Cisco Employee
  • 1661 Views
  • 2 replies
  • 0 Helpful votes

Good morning,I have set up LDAP to do external authentication on the ESAs with no issue. However, when trying to do the same on the SMA, I get an error when testing the server. It says the connection to the port is successful, but my credentials are ...

Hi, Recently we configured our mailflow to go from Office 365 directly to our CES. Now we are seeing issues with an exceeded hop count. This occurs when CES is trying to deliver the mail to an recipient that is also in Office 365. Somehow the message...

Resolved! DLP Report on ESA

I am beginner in ESA i have Model : Cisco C390 Version: 15.0.0-104 I need to schedule the DLP report on ESA.In this report i need to get details of Sender ID, Recipient ID and which DLP policy is trigger while sending mail.

Hello All, Please find below SSLCONFIG defined on ESA (C395 - 14.2.3-031) and the result of the Qualys scan : About ECDHE-RSA-NULL-SHA, I tried to disable -aNULL (Inbound and Outbound) but I still see NULL-SHA256 when I did "Verify" TLSv1.2 and confi...

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CSCO11645642 by Frequent Visitor
  • 2034 Views
  • 3 replies
  • 0 Helpful votes

I need confirmation for what exactly SMA collect from ESA. Do SMA collect all information in Monitoring menu of ESA? What I mean is all of this menu: Do SMA only collect information from the incoming mail, sender groups, sender domain reputation, - o...

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Joehard by Frequent Visitor
  • 1105 Views
  • 1 replies
  • 0 Helpful votes

We currently have CISCO ESA C390 physical devices. We would like to replace these devices. We have a current vmware ESXi environment running VMware vSphere 7. Is this supported to host CISCO virtual appliances to replace our current physical devices?...

ollie.cull by Community Member
  • 691 Views
  • 2 replies
  • 0 Helpful votes

https://tools.cisco.com/bugsearch/ only allows to search with a bug Id.Any other terms will be rejected.The links in release notes are non-functional too.As I used BST last year, it allows to search for releases and other terms.How to search known an...

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