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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
  • 868 Views
  • 2 replies
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Hi All, Have already running Ces instance for incoming and outgoing mails for domain xyz.com,xyz.co.in & xyz.in, where i have done configuration for both and inbound mail routing. Now we have procure one more instance just for outbound mail routing a...

Vishal6 by Level 3
  • 1761 Views
  • 10 replies
  • 0 Helpful votes

Hi All, I have observed mail release from any quarantine folder contains same sender group in both quarantine and release mail. My query is would not be release mail sender group will be Sma ? PFA snapshot Actual mail message tracking logs Sma relea...

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Vishal6 by Level 3
  • 385 Views
  • 1 replies
  • 0 Helpful votes

Hello all,In my firm we are using cisco email manager.when we receive spam quarantine email we don't want to show the links and view all quarantined messages.Any idea how I can do it?  

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kadriin by Level 1
  • 359 Views
  • 1 replies
  • 0 Helpful votes

Dear community, I'm testing the new v15.5.2 version of ESA and I went through the deployment guide but I'm a bit puzzled with Smart Licensing. Note: I don't have an active license in my Smart Account for ESA (I just want to do a demo/test for a few ...

REJR77 by Level 1
  • 804 Views
  • 2 replies
  • 0 Helpful votes

Dear supporti am trying update the security profile but i reach all connect to server and failed to update dns is configured and the appliance can reach the internet what i can do ,

Hello All, Need some help in understanding Sender Domain reputation in Cisco CES 1. Does having good sbrs score still a domain can be a threat category. PFA 2. What needs to be add in domain exception list, so that next time sdr would not be scan for...

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Vishal6 by Level 3
  • 775 Views
  • 3 replies
  • 0 Helpful votes

Hi All, I'm trying to test smtp server using smtpping tool for inbound and outbound. However im sucessful able to test inbound mail using data 1 interface however for data 2 not. Can anyone let me know what i'm missing here.    

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Vishal6 by Level 3
  • 2134 Views
  • 11 replies
  • 0 Helpful votes

Hello All,   Received an error "bounced by destination server. Reason: 5.3.0 - Other mail system problem ('550', ['Message rejected due to user rules.'])" while sending an mail to outside domain. However i have observed mail deliver for yahoo.com and...

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Vishal6 by Level 3
  • 448 Views
  • 0 replies
  • 0 Helpful votes

I'm interested if there's a way to review/download attachments from the emails which have been placed in SPAM quarantine (not in Policy quarantine). Maybe some changes could be made from Email gateway.I'd highly appreciate any feedback and support.P....

Giorgi007 by Level 1
  • 4315 Views
  • 6 replies
  • 0 Helpful votes