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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
  • 881 Views
  • 2 replies
  • 0 Helpful votes

Hello,   One External User (Gmail.com) send mail to our Internal User (Inbound Email) with JPG attachment of 500 KB. When verified in the IronPort logs in SMA, we found that email was delivered successfully. Please find the log as shown below Mai...

spisipati by Level 1
  • 2074 Views
  • 2 replies
  • 0 Helpful votes

I am very new to Cisco Ironport support. There is a requirement of ESA Upgrade from C370 to C390. Do we need to procure anything from Cisco for this Upgrade? Or can we directly Upgrade. Is it only ASyncOS or any other things we need to take care. Kin...

spisipati by Level 1
  • 3133 Views
  • 5 replies
  • 0 Helpful votes

Resolved! FreeBSD

We are running the latest software version 9.7.0-125 and the vulnerability scanner is Nessus. According to FreeBSD the Engineering Release version 9.2 is end of support whereas version 9 Stable Release support is 31/12/2016. Is it reasonable to confi...

mynetapp_ by Level 1
  • 8753 Views
  • 10 replies
  • 0 Helpful votes

Resolved! ESA - rate limit

Hello,   Is it possible to configure the rate limit in "monitor only" mode?  I'd like deliver each messages but I'd like to track the rate limiting threshold. I tried to set a "Sender Rate Limit Error Code: 220 in the mail flow policy but it is not w...

I have a question involving TLS.  When setting up SSL configuration lets say for inbound email, we can set which methods to use, then we can set a cipher string.  In the methods I can choose to enable SSLv3 or not to.   Then in the Cipher string itse...

Hi community,   I have a C300V device and I would like to create a new CF rule, that contains multiple OR, AND conditions. I am just wondering how one can do this? I imagine this would have to be a manual regex?   For example: if (rcpt-to == "@gmail....

FP1 by Level 1
  • 2111 Views
  • 3 replies
  • 0 Helpful votes