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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 workloa...

dmccabej by Cisco Employee
  • 1670 Views
  • 2 replies
  • 0 Helpful votes

Hello,I have these messages sent only to a specific domain that aren't being delivered.This is the error I got from SMA/Message tracking:19 Jul 2021 18:06:12 (GMT +02:00) SMTP delivery connection (DCID 14832928) opened from Cisco IronPort interface x...

Hello, There is a request to unblock an email that has been filtered and blocked but I can't find where it is. Unless you have to do an initial configuration to be able to do it but I do not know if this is the case. Thanks in advance for any feedbac...

CED1 by Community Member
  • 3799 Views
  • 1 replies
  • 0 Helpful votes

The Python that is installed, is on version 2.6.4, which is end of life and not supported anymore, so it flags in vulnerability scans. Is there any plans for the ESAs to use a supported or latest (3.8) version of Python?

dbl by Visitor
  • 13667 Views
  • 12 replies
  • 5 Helpful votes

I'm trying to write some automated processes for my SMA using API and PowerShell. I've already figured out how to do everything I need to do my question is about Authentication.  So all of the functions and processes I've written are using Basic auth...

Hi,   One of our customer experience automatic session timeout when they log in to CRES. Multiple users experience the same. They are getting  "Your session has timed out" error and getting logged out when navigates to other menus within the site (pl...

smaliyak by Frequent Visitor
  • 3256 Views
  • 5 replies
  • 0 Helpful votes

I have recently updated my ASyncOS to the latest version; 13.5.1-277 due to some CVEs released for the code that I was running.  I have not changed any other configurations to the devices, but I am now going into resource conservation mode several ti...

Hey guys, How is the Forged Email Detection score calculated?  Is it a simple letter for letter percentage match? I've got some inbound email that has close analogs to names in our list but are getting flagged by FED, and I need to know what effect c...

Hi there,We are sizing up O365 E5 v Mimecast v Cisco. We already own the E5 licenses so this is in the lead cost-wise. I've used Mimecast extensively and liked it, but found it to be a bit soft on occasion. I am in the dark about Cisco's offering.Is ...

JesonMile by Community Member
  • 1246 Views
  • 1 replies
  • 5 Helpful votes