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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

Ironport back-up smtp routes

Hi Guys, I have 2 lotus notes servers. Is it possible on the ESA to add these two servers on the SMTP routes while using the same domain name? How will the ESA forward incoming mail then? Some sort of load balancing, or will it be a priority thing? T...

Resolved! Replace C150 with C170

Hi,We've recieved two C170 as replacement for our existing C150. The two appliances are in a cluster, and I've read https://supportforums.cisco.com/thread/2090049 about how to replace the device.One thing that comes to mind is; what about mails in qu...

Thinking about getting a C170

Our company is considering purchasing a C170 appliance with the hybrid cloud support also. We have about 500 users and would be using the encryption and DLP features as well. Any opinions from thos using this setup? Is this a good solution or should ...

Resolved! ESA: Which features require a FeatureKey?

Hello,We are looking to replace an old C150 appliance that was purchased back before the Cisco-IronPort acquisition. The only feature we actually use on the appliance is the outbound DKIM message signing - no inbound features at all are required (it'...

jluebbers by • Level 1
  • 4318 Views
  • 3 replies
  • 5 Helpful votes

Move config file from c160 to c170

I am doing an RMA to our unit the old unit is c160the new is c170            The old appliance was OS 7.6.1-022The new appliance is OS 7.5.2-101I want to move the config file from the old one to the new one,however I am getting "Error   —       No av...

Senderbase Reputation Bad

   Does anyone know of any way I can find out WHY my IP address has a poor senderbase reputation score?   It's causing major issues for our business as we are unable to contact our biggest customer. We send dozens of emails a day to their servers, an...

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