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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
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Resolved! physical onsiteGateway C195 is running out of licence, renew possible?

Hello, is it possible to use Licence:Cisco Secure Email XaaS SubscriptionCSEMAIL-SEC-SUBwith a a physical onsite Gateway C195 devices?GOAL using this subscription:IronPort Anti-SpamSophos Anti-VirusOld Manufactorer P/N was :ESA-ESI-LICEMAIL-SEC-SUBTh...

AsyncOS 16 Features

Hi Dear SupportIs there any Training Videos by Cisco Professionals about AsyncOS 16 new features in ESA? I will appreciated for your valued response . By the way, i read AsyncOS 16 Release Notes PDF and Web Based User Guide about this release in the ...

OutSide Email Send issue

Hi Team,  While sending email to Outside domain users we received NDR for those users with different details. so can you please le me know if we want to verify attached users are legitimate or not? Please find attached users email id details for your...

Emails are bounce

 Dear Team,we are facing email bounce issue, olease find the bellow email fpr your reference.Delivery has failed to these recipients or groups:ajwathabdeen@gmail.com (ajwathabdeen@gmail.com)Your message couldn't be delivered and there was no valid en...

Cisco Aggregator unable to connect

Good Morning,we have following problem...The Warning message is:Unable to connect to the Cisco Aggregator Server.Details: (6, 'Could not resolve host: aggregator.cisco.com').Cisco C390Version: 15.0.2-034Timestamp: 19 Dec 2024 05:52:32 +0100Is there a...

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