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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.

 

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Migrate from Secure Email Virtual C100V to Avoid McAfee-Related Issues

  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
  • 868 Views
  • 2 replies
  • 0 Helpful votes

Fortimail To Cisco ESA Migration

Hello, I've got the following question. We have a customer which is currently using Fortimail as email security solution. We are going to migrate the customer to Cisco Esa, my inquiry is if there is a tool to export or copy the config and import it t...

dimi.kard by • Level 1
  • 742 Views
  • 1 replies
  • 0 Helpful votes

Geolocation content filter works rarely

I have a virtual ESA with a geolocation inbound content filter as the 3rd filter from the top of the list.  It doesn't work and only sporadically when it does.  Since we are a community-based firm, we would like to quarantine all email that isn't com...

Greg Hopp by • Level 1
  • 1592 Views
  • 2 replies
  • 0 Helpful votes

Resolved! ESA Content filter by attachment name

Hello,I have set content filter policy with condition "Attahment File Info" where i set attachment-filename == "WORD (A) (1) (2)" And action put to drop.It is not working when i send test file named WORD (A) (1) (2).pdfI have tried putting followinga...

freez007 by • Level 1
  • 1059 Views
  • 2 replies
  • 0 Helpful votes

DKIM failure auto reply from ESA

Hello, we have a problem with auto reply messages on the Cisco ESA. It is only the generated auto replies from the ESA that seem to get the DKIM errors. Could this be a configuration error?

maraz by • Level 1
  • 1302 Views
  • 4 replies
  • 0 Helpful votes
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