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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

Hello,People can send me emails sometime and I can see that TLS 1.3 was in place, some time same sender is not able to send me email  and get this bounce back alert"The following message to *@domain.com was undeliverable.The reason for the problem:5....

KhanSb by Level 1
  • 336 Views
  • 3 replies
  • 0 Helpful votes

Anyone with an NMLS ID is required to display them prominently in their email.  Our employees have it embedded in their signature line similar to this:<NAME> | <TITLE>NMLS ID #########P: (###) ###-#### F: (###) ###-####email@address.netThis is causin...

clibby1 by Level 1
  • 390 Views
  • 4 replies
  • 0 Helpful votes

We have received 100s of infected SVG files, and have blocked emails with SVG attachments. We do have two departments who use the files for legitimate reasons, but I don't feel safe allowing them to even a few people if the risk remains high (I've ev...

I've had a request from several users in our Organization to receive a summary of ALL blocked emails daily.  What I would like to do is be able to send basically a view only summary of all blocked emails (including Policy, Virus, Outbreak) to these u...

mjmoose by Level 1
  • 174 Views
  • 1 replies
  • 0 Helpful votes

We use an SMA for a mail relay environment at a customer. End users are accessing the HTTPS production interface for the SPAM quarantaine. Our operation team use the HTTPS management interface for daily operation. They are using the old web interface...