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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

Trying to configure Cisco Email Submission and Tracking Portal to view all our SPAM submissions. We are supposed to get a registration confirmation mail from SubmissionPortal@cisco.com  for every new domain added over there to postmaster@domain.com. ...

Pravar by Level 1
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  • 2 replies
  • 0 Helpful votes

Hi, Good Day, I have questions regarding my Subject above, can you help me what is the best to implement first on our Email Security Appliance? What is the difference between them? How to block/filter spoof domain? Hoping for your response. Thank ...

Hi Support Community, I just configure the SPF verification on my ESA. In the content filtering i was created two filters which Softfail and Hardfail. After a week monitor this settings, we found out that some of email was unable to delivered and hi...

We recently enacted DMARC and are seeing some fails saying that some emails from one of our domains are being signed with another or our domains keys.  Is there a way to determine which outbound emails are being signed by which keys? Thanks

Did anyone face a soft bounce problem with following error "amitabh.chak@xyz.com delayed. Reason: 4.3.0 - Other mail system problem ('451', ['4.7.0 Temporary server error. Please try again later. PRX2 ']) []23 Apr 2017 17:19:50 (GMT +06:00)   Messag...

rockbd by Level 1
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  • 9 replies
  • 0 Helpful votes