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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! AsyncOS 8.5.6 Header Repeats feature

In the 8.5.6-092 update, there's a new feature called Header Repeats that allows you to filter subject or sender criteria in the header. Is there a GUI configuration page for this? All I can seem to find in the documentation refers to CLI configurati...

kmkrause2 by • Level 1
  • 1480 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Upgrade Ironport C170 to version 8.0.1-023

Hi, my environment has 01 C170 box with the version 7.5.1-102 and I bought 01 C380 to upgrade the infrastructure.My question is, in order to I get the successful upgrade I have to upgrade the version from C170 to the same C380.The C380 came with the ...

rsoave by • Level 1
  • 2721 Views
  • 7 replies
  • 0 Helpful votes

Attachments being removed

Hey Guys I have an issue here when the IronPort (AsyncOS, 8.5). scans emails from particular sender the folling error occurs and the attachment is stripped. Message 129182579 scanned by Anti-Virus engine Sophos. Interim verdict: CLEAN Message 1291825...

Has anyone upgraded the Ironport ESA to 8.5.6-074 and had the issues of Raid status showing unknown?

Has anyone upgraded the Ironport ESA to 8.5.6-074 and had the issues of Raid status showing unknown? After we upgraded our appliances we are having issues with our ESA appliances showing the RAID status as unknown. When we reported the issue to CISCO...

TLS v1.2?

When is Cisco planning on moving to TLSv1.2 (released in 2008)? Now that CVE-2014-3566 has made SSLv3 unusable, a major flaw in TLSv1.0 will leave customers with nothing. TLSv1.0 was released in 1999. Other things released in 1999: RIM Blackberry, 80...

Bob Fayne by • Level 1
  • 924 Views
  • 0 replies
  • 0 Helpful votes
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