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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

  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
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The documentation indicates IronPort's System Log captures commitments. What other items does it capture? Identification/authentication to the CLI/GUI? Is the complete list of attributes listed anywhere?

As in cool new toys for us to download from IronPort or as in what tools does the good people of the 'Nation use?Assuming the latter, here are a few of my personal favorites:http://groups-beta.google.com/group/news.admin.net-abuse.emailhttp://www.men...

Quick Question,I have 4 C600 in a Cluster (4.7.1)2 of my C600's have over 5000 Messages in its Workqueue and the other 2 have less than 300 each, Anyone have any ideas as to why this could happen within a Cluster Setup ? Any settings i can look at...

Hello,Please excuse me if this is a stupid question... i just implemented exchange 2007 with an IronPort C100 to catch emails, filter out spam, then deliver them to the exchange.My question is this... when I look at the monitoring page my outgoing em...

I have made a little drawing to visualize the CLI.I tried to separate the CLI into sections for receiving, delivery,workqueue and management.The green characters are my comments.The blue lines indicate object relations.the drawing can be downloaded h...

Hello,Just wondering if anyone is noticing that after each upgrade they do of AsyncOS, the performance of the system goes down and down.We have been running our C60s for 1 1/2 years, starting with the 3.8 build of AsyncOS.After this last build (4.5.5...