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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
  • 1542 Views
  • 2 replies
  • 0 Helpful votes

Unable to receive any email from @cisco.com

I am a systems admin at a small engineering firm. For the past year or so anyone at my company cant receive any emails from anyone with a @cisco.com email address. We are not Cisco customers and do not have any contract numbers or Cisco products. In ...

jj713 by • Community Member
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  • 2 replies
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Duplicate MIDs

Hi everyone, We have 3 ESAs in a cluster reporting to an SMA. We have been seeing more duplicate MIDs when searching message tracking in the SMA. As I understand it, clustered ESAs do not coordinate MID generation. But is it possible to seed the sta...

joelbland by • Level 2
  • 3060 Views
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Delivery Status: ABORTED

Hello Leads,  One of SMTP domain is trying to send an email to our users but I found this "Delivery Status: ABORTED"  Message 20309186 aborted: Receiving aborted by sender.Message 20309186 Delivery Status: ABORTEDHowever, this sender domain IP addres...

Anilkumar48 by • Frequent Visitor
  • 13938 Views
  • 7 replies
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Resolved! TLS Configuration Requirements

Hello, I am new to Cisco ESA, so can you please help me with the below? I think it must be easy for someone familiar. We have a partner who want to meet the following requirements: 1) Minimum requirements TLSv1.22) Use of approved X509v3 digital cert...

spacemeb by • Level 5
  • 2711 Views
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Resolved! WSA + ESA LICENSE QUESTION?

hi I need your help to clarification of WSA AND ESA WE HAD AS FOLLOW:   WSA: SMA-BNDLPERP-LIC SMA-WMGT-LIC   and    ESA:   ESA-AMP-LIC L-ESA-GSU-LIC ESA-ESP-LIC     and    SMA    SMA-WSPL-HIGH-LIC SMA-WMGT-LIC   my question can I add ESA to advance r...

elbeshti by • Frequent Visitor
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ESA Licensing

Hey everyone, Our ESA feature keys are about to expire and we are going to renew it. here is my issue, we need to use traditional licensing with PAK file. We can not use Smart licensing for various reasons, so first of all, I want to make sure we sti...

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