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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
  • 745 Views
  • 2 replies
  • 0 Helpful votes

Hello, When we get a non-deliverable email we get the error message back , with a 35Kb attachment type subject.eml - but every email is the same size and when opened it has no contents. How do I attach the original, rejected, email to this error? 

Screenshot 2021-04-01 at 13.46.23.png

Hello,Can anyone give me an idea or an advice on how to create a content filter within email security to mark or quarantine emails with non matching from headers. For example, I want to identify emails where I see these not matching headers: Message ...

We have a Dictionary setup with all of our Executives on it to protect us from receiving emails from people pretending to be our executives and this works great. I was wondering if it would be possible to do something like this with all users in our ...

Hi, I am relatively new to Ironport but have invested quite some time in testing and reading the best practices and the documentation. I couldn't find/understand information regarding the different situations that we use Antispam setting options - in...

kaizen by Level 1
  • 2437 Views
  • 2 replies
  • 5 Helpful votes

I've mapped out steps to set up SPF, DKIM and DMARC checking in our IronPort cluster, and run through them in test - the only problem I have is at the point where you export and re-import the DMARC profiles. It looks like the export works to create a...