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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
  • 903 Views
  • 2 replies
  • 0 Helpful votes

Mail Flow Central

Hi!Mail Flow Central is no longer supported but it is necessary to archive mail logs from ironport c150 appliance.  Cisco released a new software product for this, or we must we must seek it from other vendors?thank you.Sergey.

Resolved! Virus Outbreak Summary

Hi,I am new to the Ironport world.  We receive a daily report (see image below) advising of local outbreaks.  Not being familiar with this I am concerned there might be an issue with our network.  Or is this spam/virus that have tried getting in that...

Resolved! Different types of Reporting

I understand that you can get reporting for domain-based reporting but I am unsure more on more of the differences on these type of reporting. can anyone please list all of the reporting options and the benifits...such as Domain-Based Executive Summa...

jonatlit by • Level 1
  • 6548 Views
  • 1 replies
  • 0 Helpful votes

Message Tag

We add a message tag to emails that are user selected to be sent secure using the Cisco Plug-in to exempt the email from DLP scanning.  Is that message tag removed when the message is sent or is it retained until manually removed?  Case - orginal mes...

Cisco IronPort ESA - C160

hi All,Cisco Ironport ESA Email Bundle with:AS, AV, Virus Outbreak Filters, encryption and DLP for 1 year (100 mailboxes)We are not familar with the Cisco IronPort Email, but has experience in deploying the WSA.Can somebody share the key concerns and...

Delivery via TLS not working

Getting the following error:(DCID 14390733) Message 31196742 to     address@domain.com     delayed. Reason:  4.1.0 - Unknown address error ('454', ['4.7.0 Failed to establish appropriate  TLS channel: UntrustedRoot: Access Denied']) [(\'from\', \'"e-...

Incomming / Outgoing

if email is comming into DATA1.reverse DNS host exchange.inside.com verified yesthen matches the Suspect SBRS.from: steve@outside.com       to: dave@outside.com>rejected by RATreceiving abortedclose.----------------domain needs to be added to RAT...A...

Cisco Registered Envelope Service Upgrade coming November 5th, 2011

Cisco Systems is pleased to announce a major upgrade of the Cisco Registered Envelope Service (CRES) scheduled for Saturday, November 5th, 2011 from 18:00 – 00:00 PST (Sunday, November 6th 02:00:00 – 08:00:00 UTC).During the maintenance window it wil...

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