Email Security

cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

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
  • 869 Views
  • 2 replies
  • 0 Helpful votes

Hi All.  We have a Failed drive in one of our Iron Port C170 devices. Unfortunatelly we no longer have a valid hw support with Cisco. Does anyone know what drive is installed on the device? I can contact our supplies to purchase the drive from Cisco ...

mpoloq by Level 1
  • 2996 Views
  • 5 replies
  • 0 Helpful votes

Hi, I have two Ironport C170 devices. One is primary and is processing all emails, second is just for backup purposes in a case of a failure of the primary device.   Can I use same feature keys in both devices or I need to purchase them separately? I...

mpoloq by Level 1
  • 1621 Views
  • 1 replies
  • 0 Helpful votes

Hello! We're testing the features of ESA C000V now. In cases when AMP capabilities is not enough: Is it possible to send URL from email body or attachments to the third-party service for analyzing? Can ESA receive URL analysis results from any third-...

Anatoliy by Level 1
  • 2200 Views
  • 2 replies
  • 0 Helpful votes

Hi Guys,   I am currently using a Cisco Email Security appliance as my mail gateway configured with public IPs. Recently I keep getting blacklisted by Baracuda and I want to investigate why. I enabled outgoing filters for SPAM but I still get blackli...

spnlloyd by Level 1
  • 1525 Views
  • 2 replies
  • 0 Helpful votes

Recently sometime my mail user facing a different error when they send mail they don't get any message after 2 hr they get following message   Remote Server returned '<[X.X.X.X] #5.0.0 smtp; 5.4.7 - Delivery expired (message too old) [Default] '[Errn...

rockbd by Level 1
  • 2250 Views
  • 3 replies
  • 0 Helpful votes