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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

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Problem with Cisco ESA and alerts

Hi, one of our customers are getting this kind of alert messages to their email boxes: The Warning message is: Unable to connect to Cisco Web Security Service. URL Filtering will not work correctly. Please verify all network, proxy and firewall sett...

Zach_Sec by • Level 1
  • 1892 Views
  • 7 replies
  • 0 Helpful votes

ESA Cluster Design

Hi Guys,Attached is a network design I have for a customer. The scenario: There are  ESA C690 X 3 that will replace (C670)s..The exact requirement is to 1. come up with the best design to setup the 3 ESA boxes in Cluster and migrate the config from ...

Resolved! Export HAT Ip's to another appliance C670-C690

Hi Is it possible to export a set of Relaylist Ip's from a HAT on a C670 ESA to a Relaylist on a C690 ESA? We have multiple ESA's and clusters so manual entry is not really an option for us with thousands of entries. Thanks, R

R by • Level 1
  • 1951 Views
  • 2 replies
  • 0 Helpful votes

SMA Quarantine Configuration!

I have 1 SMA and 2 ESA, everything is working fine like, reporting, filtering, PVO, etc.. except for the centralized quarantine, i have configured the centralized quarantine for both ESA and pointed it to SMA, but i am not seeing any quarantine email...

Resolved! SMA Issue with ESA

Hi, I have 1 vSMA(600) and 2 vESA(600), i was able to merge all the reporting and quarantine stuff including PVO and they are working perfectly. However, if i want to change the policy, i did see any policy like incoming and outgoing mail policies,...

Resolved! ESA Mail Filter question

Good afternoon, I'm trying to build up filter for inbound / outbound emails that will be trying to match some header and check its value. Once that found - message must be send to Alternative Destination Host (don't use SMTP route). I did build such...

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