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
  • 2249 Views
  • 2 replies
  • 0 Helpful votes

in ESA - I have HAT Overviewin some groups, both IP's and domain names (saender or recipient domain names)  and servernames (MX of recipieint domain)  are added This is in block list this is in allowed listdoes this really - work.. becuase when I try...

GRajuK_0-1782222805020.png GRajuK_1-1782222862123.png GRajuK_2-1782223000260.png
GRajuK by Frequent Visitor
  • 894 Views
  • 8 replies
  • 0 Helpful votes

We have Aadhar Card , PAN card with 50 count is configure . We have to change it to 25 .and Can we add1:- Client address2:- Bank Name3:- Account number4:- IFSC code of Bank5:- Nominee Namealong with Aadhar Card and PAN card

Vishal6 by Level 6
  • 421 Views
  • 2 replies
  • 0 Helpful votes

I have about 3000 Ip's that need to be blocked/rejected connectins when an incoming email are reeived from them.I know, I had to do this in HAT - - but adding 3000 IP's in HAT is a real manual and tedious process.is there a way to achieve this with g...

GRajuK_0-1780640513010.png
GRajuK by Frequent Visitor
  • 703 Views
  • 3 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
  • 679 Views
  • 1 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
  • 745 Views
  • 2 replies
  • 0 Helpful votes

Hi,Configure an dkim profile and signing keys on CES gateway, it shows warning message on gateway, however on mxtool box shows dkim publish sucessfully.  

Vishal6_0-1776664588381.png Vishal6_1-1776664717345.png
Vishal6 by Level 6
  • 1243 Views
  • 4 replies
  • 0 Helpful votes