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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
  • 1176 Views
  • 2 replies
  • 0 Helpful votes

In reading multiple post, it does not seem to be possible to verify seat count on ESA via the GUI. Why? If I'm wrong, how to show? Also, to understand when my license expire, I need to go to a different screen, again, why? During the last VoE on emai...

Sir,My clients are unable to send mail as their mails are getting bounced with below error.I have hosted my clients at :208.77.145.237208.77.222.188I have checked, there is no spamming done from any system. You are requested to kindly change the repu...

eurekaexim by Community Member
  • 136613 Views
  • 14 replies
  • 0 Helpful votes

Folks, Trying to setup a content filter to search the body of the email for a sentence/phrase and not having a lot of luck getting it to work. Looking to setup a filter to match on "You'll make the payment through Bitcoin" so that I can send them to ...

SgtD by Visitor
  • 1594 Views
  • 2 replies
  • 0 Helpful votes

Hi, i have to redirect all my incoming mails to a mta that i am not allowed to manage. Now i have the challenge to keep the mailflow working even if the boxes are not available. In best case without any manual configuration. The redirect to the other...

BigRed by Level 1
  • 1264 Views
  • 1 replies
  • 0 Helpful votes

Dears, I have a general query, why I need a email security in the Enterprise network , when I have a UTM firewall which does url filtering, application filtering, ssl inspection, Intrusion prevention, Antivirus, AMP, when an email is passing through ...

adamgibs7 by Level 7
  • 2110 Views
  • 5 replies
  • 0 Helpful votes