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 workloa...

dmccabej by Cisco Employee
  • 1660 Views
  • 2 replies
  • 0 Helpful votes

 Hi Cisco community,our vESA has been intermittently throwing LDAP errors when attempting to look up recipients. This also happens when it's trying to inform users about messages in their personal spam quarantine. By intermittently I mean that for ov...

PASc by Visitor
  • 169 Views
  • 2 replies
  • 0 Helpful votes

Hi,Received below vulnerabilites on my virtual esa, need to know is it any ffirmware address this all.    SSH Server CBC Mode Ciphers EnabledCVE-2008-5161LowDisable all weak CBC-mode ciphers on the SSH server including 3des-cbc, aes128-cbc, aes192-cb...

Vishal6 by Level 6
  • 132 Views
  • 0 replies
  • 0 Helpful votes

I am not a Cisco customer, I currently have 3 customers who are not able to get mail from my company.  This has started affecting business, I need to get into contact with anyone that can explain why our IP has been blocked at a higher level that the...

CarolT by Community Member
  • 385 Views
  • 3 replies
  • 0 Helpful votes

We are a CES cloud customer.  We have always quarantined email that includes URL's that score -6.0 to -10.0.  Beginning on April 20, the volume of email caught by this quarantine has more than doubled, nearly tripled.  Along with this have been ticke...

Hi All, Need to integrate CES with O365, however im not getting an option in mail flow rule "For *Apply this rule if..., choose: The sender is located...  Attached snapshot from o365 for reference. Pls guide if any alternative can be use here ?  

Vishal6_0-1775466109046.png
Vishal6 by Level 6
  • 530 Views
  • 3 replies
  • 0 Helpful votes

I Have cisco ESA and SMA in SMA, I have "Spam quarantine" and "Policy, Virus and Outbreak Quarantines"In "Policy, Virus and Outbreak Quarantines" I have multiple quarainte folders avialable. like custom blocking, vrus, other classifcatinos as needed....

GRajuK by Visitor
  • 378 Views
  • 2 replies
  • 0 Helpful votes
Top Solution Authors