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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
  • 725 Views
  • 2 replies
  • 0 Helpful votes

Hello All, Need help on below points Integration of CES CLI and GUI Login with SAML SSO using Microsoft Azure AD I'm in the process of integrating CES CLI and GUI login (cluster of 8 instances) with SAML SSO using Microsoft Azure AD. I'm referring t...

Vishal6 by Level 3
  • 1493 Views
  • 9 replies
  • 0 Helpful votes

I am moving for a C000V to C100V I have the VM up and running but when a loadlicense I get: You could not load the license file in the appliance because it did not contain a cloud feature key. You can retry to load the license file with a cloud featu...

KevinKRoy by Level 1
  • 804 Views
  • 2 replies
  • 0 Helpful votes

Hello,The IP address that my client is using to send has been listed as "Spam Level - Critical"I made a ticket to ask for the reputation to be adjusted, but was denied with them saying the following:"RESOLVED_CLOSED : UNCHANGED - Our worldwide sensor...

Hello there - we are working with a C300V. For the past couple of months my system has been delaying relays from 1800-ish to 6:30-ish.  Logs show it gets delayed: 4.3.1 - Mail System full, however regular mail moves just fine, and this is occurring e...

AOpstein by Level 1
  • 1134 Views
  • 3 replies
  • 0 Helpful votes

Resolved! SPAM notification

Hi, I wonder if there is a way to notify a group of people when a SPAM arrives to the ISQ? I do not mean notifying the end user, that was no problem to get working. Here there is a group of people that will check SPAM for all users and will decide if...

Hi All, Disk quota for Policy, Virus and Outbreak Quarantines getting 99% on my Cisco Cloud Email Solution. As per below document it applies default action to make space for more logs and as per my configuration my default action is delete. Taking co...

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Vishal6 by Level 3
  • 2128 Views
  • 10 replies
  • 0 Helpful votes

For redundancy, we have two mail servers on different internet connections.  Is there a way to make the appliance do the following:deliver to primary server if availableif primary server not available, deliver to secondary serverif primary and second...

tomj-tpi by Level 1
  • 484 Views
  • 2 replies
  • 0 Helpful votes