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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
  • 332 Views
  • 2 replies
  • 0 Helpful votes

Hello all,We have to comply to the standards of internet.nl and have to configure ESA for this. (More information about internet.nl see this post: https://community.cisco.com/t5/email-security/esa-internet-nl-cipher-string/td-p/4540206).At the moment...

Hi, We want to automate the ESA configuration backup on weekly basis.The ESA's we've are in cluster group. 2 in DC & 1 in DR. Can anyone provide the steps to do it? Thanks & Regards,Vikram Murudkar.

The CUIC Large Schedule process in CUIC 12.5 is limited to .CSV files. The Large schedule interface automatically accesses reports specified by the user through the interface. Does the sftp process automatically convert the reports  to .CSV format be...

jboresta by Level 1
  • 376 Views
  • 0 replies
  • 0 Helpful votes

Hello Team,I hope you're doing well.We want to upgrade our CISCO Email Security Gateway infrastructure to the latest version. We have:- One SMA C690 (Standalone) with 13. 0.0-392 AsyncOS version- 05 ESA C390 (02 Clusters and one standalone) with 13. ...

RTE by Level 1
  • 844 Views
  • 3 replies
  • 0 Helpful votes

Hi all,Want to deploy an Email Security appliance on Vmware server. But not finding any document about its prequiste and setup guide. It would be a great help if someone help me on this.

sv7 by Level 3
  • 643 Views
  • 5 replies
  • 0 Helpful votes

We use Ironport for system-generated outbound emails & Gmail for our inbound user mail. An application owner has asked if we can relay email to third party recipients via google and have it show up in the application admins Sent folder in gmail.Is th...

Our C170 went EOL and end of Cisco support while we are waiting for a replacement. Our feature keys are all active for another 700+ days, including Sophos Anti-Virus. However, we are getting email warning messages stating "Warning <Anti-Virus> [DN of...

jcapron by Level 1
  • 3333 Views
  • 15 replies
  • 0 Helpful votes

Hi all, are there any plans to support BIMI (https://datatracker.ietf.org/doc/draft-brand-indicators-for-message-identification/) on the ESA? I.e. while receiving an external message check authentication and BIMI selector header, download BIMI inform...

Trying to figure out why my newly deployed FTD device still insists on inspecting SMTP traffic. Cisco Firepower 2130 Threat Defense running 7.0.1-84 code. Telnet to my Internet mail host behind my FTD on port 25 from the Internet like so:telnet <mail...

rfranzke by Level 1
  • 2187 Views
  • 2 replies
  • 0 Helpful votes
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