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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
  • 876 Views
  • 2 replies
  • 0 Helpful votes

Resolved! How to find out who released an encrypted email in ironport? C160 Appliance

Hello,We have quite a few users who can release emails. We need to find out who released an encrypted email. When we track the encrypted message through message tracking it shows it was manually released but no credentials are provided. I checked the...

Resolved! This message has been blocked because the HELO/EHLO domain is invalid

Hi friends,  We are using cisco ironport c170. Today we cannot send email for particular email id(domain). the error msg as below,Diagnostic information for administrators:Generating server: sgm.svc.com.sgabc@anson.com.sg[182.**.**.51] #<[182.**.**.5...

Policy for Incoming mail

I want to configure one policy for incoming mail i.e. any attachment in incoming are of following type then it should directly drop the mail.e.g.  msc, msi, wsf, add, mde. How do i configure policy above requirement, kindly someone tell me the steps ...

outgoing mail domain issue

I am getting a below error for one domain.users are sending the mail to this domain are getting softbounce with the error Reason:4.1.0 - unknown address error (451 Temporary local problem- please try later}find error in detail in attachment.want to c...

Resolved! Inaccessible IronPort c670 appliance from both GUI and CLI. Can I tunnel-in from other c670 appliance in the cluster?

I am unable to access one of the 6 IronPort appliances. Also, got an error that the appliance has got disconnected from the cluster. Is there any CLI command I can use to possibly tunnel-into the faulty appliance from another appliance in the cluster...

Resolved! What i need for outgoing mail?

Hello, i need some help with configuring outgoing mail, i know how to configure IP Interface and Listeners, but after i would do it,Would it works automatically that all outgoing mail would pass through Ironport OR i need somehow send mail to Ironpor...

Resolved! CRES email delay

Is anyone else having an issue with encrypted email responses? An example is you send a CRES email to a user. They get the email in the normal amounnt of time but when they open the email and respond it takes a abnormal amount of time to receive the ...

KFrank by • Level 1
  • 3672 Views
  • 5 replies
  • 0 Helpful votes
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