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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
  • 1016 Views
  • 2 replies
  • 0 Helpful votes

Change SMA IP Address

What would I need to to in order to properly change IP address for the SMA?  I have Centralized Spam quarantine with 3 ESAs in a cluster. I'm thinking just removing ESA and re-adding them.... anything else?

jtsai8585 by • Level 1
  • 2336 Views
  • 3 replies
  • 0 Helpful votes

ESAv Route via separate subnet

I have a weird scenario, the ISP we are using for one of our test ESXi installations hands out IP via mac assignment.  Our primary ESX server has an IP on one subnet with a default gateway pointing to it's subnet.254. The VM's get a ARIN block, but t...

Best approach for Ironport ESA POC

Hi All, I need to see how good is ESA to proof  email protection against other leader like Proofpoint, etc. What should be the architectural best approach I have already one on cloud email security protection and i want to use ESA as proof of concept...

Resolved! Detecting xss embedded emails on ESA

We are in the process of hardening our email security by implementing best practices on Cisco ESA (content filters, spf, etc). We were testing Cross-Site Scripting (XSS) and noticed that emails that contain malicious XSS scripts and opened from a web...

Missing Feature Keys

This morning I had to apply new licenses to our virtual ESAs.  The licenses which I was sent only included the Incoming Mail Handling feature key.  I didnt realize this until after it was applied.  For roughly an hour today, both our inbound and outb...

Virtual ESA

Hi All, i am new in security and going to deploy Virtual Email Security Appliance but little confuse about HAT and RAT example i need to allow following domain form outside allow domains from outside amazon.com smith@amazon.com block domains : anim...

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