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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

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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
  • 876 Views
  • 2 replies
  • 0 Helpful votes

License expired on c160

                   HI,how can i update license on c160.The license will be expired on 23 june.As per cisco the license has been renewed .When i click update feature key on c160 it says no feature key foundKidnly advise

S160 upgrade failed

    HI,I try to upgrade my s160.I tried many time and always it gives error.The upgrade patach automatically downlaod to ironport device.Is there any way i can mention separate upgrade server

Resolved! Message not found?

Hi all,So I have an IronPort C670.  I'm grepping the mail logs and see a message of interest.  The log shows MID of 12345.  If I try to do a showmessage and enter the MID, i get back a "MID 12345: Not found".  Am I looking in the wrong place?  Wantin...

gquitugua by • Level 1
  • 1539 Views
  • 2 replies
  • 0 Helpful votes

CRES Feedback

Currently we have implemented IEA appliance in the Websafe mode.  However, Cisco has abandoned this product line and we are evaluatiing alternatives to this secure mail product.  Of course one option would be to convert to using CRES, we are looking ...

Resolved! How to create a CRES corporate account?

In the ESA Configuration guide, it lists a step as "If you want to use the hosted key service, create a Cisco Registered Envelope Service corporate account. You create the account by clicking the Provision button after configuring an encryption profi...

tmorgan11 by • Level 1
  • 3914 Views
  • 4 replies
  • 0 Helpful votes

Please use the logconfig->hostkeyconfig command to verify (and possibly update) the SSH host key for

let me start off by saying the Search feature on this forum [ahem] community is horendousAnyway we replaced our C350 appliance with the newer C370 and now our M650 appliance complains that:The host key for 111.122.133.144 (IP Address obfuscated) appe...

S160 need to allow facebook.com

Hi,I need to alow facebook.com which comes under social website which is  blocked .I just want to allow facebook.com .i created customer web filter and its seeems i can go to facebook.com but when i press login button the  page show incomplete like i...

Help with CLI filters

Good Afternoon,We are attempting to allow in a particular email by looking at a "X-Header".  The vendor has given us the "X-Header" and I'm attempting to use it in a filter.  Here is the filter that I have set up:allow_webfilings: if (recv-listener =...

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