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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
  • 1582 Views
  • 2 replies
  • 0 Helpful votes

upgrade

System Upgrade —   Processing...Overall Progress:0%   Error during upgradeThe following errors occurred during upgrade:Download error: http://updates.ironport.com/asyncos/phoebe-8-5-6-106/hints/default/1Upgrade exited without success.Please attempt t...

Resolved! bounce verification

Error reports began to come more recently like: #5.0.0 smtp; 5.1.0 - Unknown address error 550-'Callback setup failed while verifying <address@domain.zone>\n(result of an earlier callout reused).\nThe initial connection, or a HELO or MAIL FROM:<> com...

DISmekalin by • Community Member
  • 3431 Views
  • 2 replies
  • 0 Helpful votes

Resolved! What is meaning of status ?

Dear  all,              like the picture,  what is meaning of status "Cisco Email Security Virtual Appliance  - System Administration > Feature Keys > Feature Keys Dormant " ? Who can tell me? Can those feature available?  ...

360rundll by • Level 3
  • 4251 Views
  • 1 replies
  • 0 Helpful votes

ESA rejecting group emails

We have an issue where all of a sudden emails inbound or outbound are being rejected if part of a group email. Individual emails work just fine but if it is part of a group it gets the delayed errors and finally drops and is never delivered. We have ...

Anti Spam -Troubleshooting ESA

Buenos días:  Tengo una consulta relacionada a envíos de correo electrónico de altos volúmenes dirigidos a distintos casillas de correos electrónicos. Mi situación actual es que los email que envío están siendo considerados como spam y me están dañan...

Resolved! SMA Error "Unexpected EOF on Connect" -> Cannot add Virtual ESA Hosts

Hi there,I wanna ask about the Security Management Appliance (SMA) error which we encounter. This is the case below. SMA||Main_Group (cluster)ESA1 (virtual)-ESA2(virtual)-ESA3(physical)-ESA4(physical) Our system consists of four ESA units. We were ju...

jaksptr99 by • Visitor
  • 6906 Views
  • 5 replies
  • 0 Helpful votes

ESA Spam

Hello everybody.I have an ESA Appliance and I remarked that the local emails and the email with our domain are considered as a spam What can I do to fix this problem ? Thank you

Odd Local Upgrade Error

Hi All,I'm just in the process of upgrading a C650 via a local web server. We've done this before with no issues, but upgrading now from 7.1.2-020 to 7.1.5-101, I select the upgrade from the available list, the upgrade begins then immediately halts w...

ChrisLord09 by • Community Member
  • 2342 Views
  • 3 replies
  • 0 Helpful votes

Resolved! Multi outgoing Listeners

Hi, I have configured two listeners (different IPs but in the same subnet and applied in the same data port) with the finality to have a primary listener and a secondary listener in case the primary will be added as blacklist. Is it possible to conf...

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