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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

Resolved! ESA | Sender Policy Framework (SPF).

One of the recommendations from the Analysis Teamis to implement the Sender Policy Framework (SPF). Kindly enlighten us on how this works and how to implement this on our Cisco Ironport. Is there any requirements needed? What are the pro’s and con’s ...

John by • Level 1
  • 12895 Views
  • 7 replies
  • 0 Helpful votes

Ironport delivery expired issue

We are running Cisco IronPort AsyncOS 9.7.0 . When trying to send to some domains bounced with Delivery has failed to these recipients or groups. in the Diagnostic information for administrators part I see that this message is generated from the Iron...

ICAP

Hello, is there any possibility to send attachments to an ICAP Service directly from the ESA and stop the Email aslong there comes a score back? If not is it planned and going to be implemented? thanks

Cisco ESA Quaratine File Attachment

Hi all, I'm bloking incoming email with attachments and send them to a quaratine policy, under monitor  Policy, Virus and Outbreak Quarantines i'm able to see the email but not the attch file and to be able to edit , after the file is put in quatati...

patcbr600 by • Level 1
  • 1502 Views
  • 3 replies
  • 0 Helpful votes

Resolved! Sending Spam notification mails to all users with restriction in releasing the quarantined messages to specific LDAP group.

 We are running Cisco IronPort AsyncOS 9.8.0 and there is integration with active directory. I can send spam notification mails to all users or to specific LDAP group of users and the spam notification mails contain View All Quarantined Messages link...

Cannot reset my password

Hi, I am having problem with my account credential. I forgot my password so I initiated the "standard forgot my password procedure"....: I clicked the forgot password link from my cisco client windows app. The client app shows a "We sent you a mail ...

Resolved! File Analysis Quarantine Question

hello, We just moved to using the AMP and had a question regarding the quarantine.  Currently when files are being checked they are placed into the File Analysis quarantine for 30 minutes then released.  Is this with best practice or how should I ha...

Resolved! Reason: 4.1.0 - Unknown address error ('452', ['4.5.3 Too many recipients (AS780090)'])

Hello, I see this message on some messages going from my company to another.  Can you confirm this is from the receiving and not my side? Reason: 4.1.0 - Unknown address error ('452', ['4.5.3 Too many recipients (AS780090)']) [ Thanks! Shawn

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