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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
  • 880 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Quarantine mails based on Threat Category

Is it possible to quarantine mails based on the threat category? I can see in the message details an entry "Threat Category: Phishing" and in the SMA I can search for them in the Sender Domain Reputation report also in the message tracking , but how ...

recipients email delivered but categorized as spam

Hi,we're facing a strange problem with our esa 11.0.3-251some of our users complain that some recipients did not get our mails.after checking the logs we found that some mails have been delivered correctly, investigating with the recipients we found ...

civas by • Level 1
  • 1450 Views
  • 0 replies
  • 0 Helpful votes

Resolved! Cisco Ironport ESA - Security Services / Scan Behavior - Impact on AV- & Spam-Scanning?

Hi, the administration guide for the ESA (v. 11.1) states: "You can control the behavior of body and attachment scanning, such as the attachment types to be skipped during a scan by configuring the scanning parameters. Use the Scan Behavior page or ....

Linuxy by • Level 1
  • 7448 Views
  • 9 replies
  • 0 Helpful votes

Resolved! Sophos Anti-Virus Engine update alert

Hi, We received an alert that the AV database on this system is expired. i tried to update it on GUI but it says the new update is not available. The installed version of Sophos Anti-Virus Engine is 3.2.07.377.1_5.70, on our ESA  AsyncOS 12.5.1-037. ...

s.rashid by • Level 1
  • 2607 Views
  • 2 replies
  • 0 Helpful votes

Weird CPU numbers on Virtual ESA

This ESA seems to be running fine, but the CPU numbers make no sense.  Anti-Virus is actually disabled on this host.  Anyone seen this?   CPU UtilizationEmail Security Appliance: 10.0%Anti-Spam: 0.0%Anti-Virus:742.0%Reporting:0.0%Quarantine: 0.0%Over...

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