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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
  • 568 Views
  • 2 replies
  • 0 Helpful votes

Apply bounce profile via message-filter

Hello,We want to specify a specific bounce-text via a message-filter.If the filter matches our conditions we use these actions:log-entry("custom filter test bounce the message");bounce-profile ('CustomBounce');bounce();In our test the filter conditio...

tbskmn by • Level 1
  • 514 Views
  • 2 replies
  • 0 Helpful votes

Resolved! DHAP prevention and NDR from Exchange

Hello community, We have the following scenario: We have to enable NDRs being sent from the Exchange server in case the message isn't sent to a recipient (invalid recipient, full recipient mailbox, etc.), but we have a feeling that this will create t...

TLS usage" option to "Preferred

I am experiencing an issue with the "Mail Flow Policy" settings in the HAT overview. Specifically, when I set the "TLS usage" option to "Preferred," the policy does not behave as expected.Currently, with "Preferred" selected, the policy only works wh...

EUR by • Level 1
  • 574 Views
  • 2 replies
  • 0 Helpful votes

Blocking spam from various sources

hiI would like to know, please, if it is possible for the system to check for spam from different sources. For example if the exact same topic comes from 5 different sources then it will be blocked.And another thing, after a few emails that are spam ...

nadavbh by • Level 1
  • 426 Views
  • 0 replies
  • 0 Helpful votes
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