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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.

 

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Migrate from Secure Email Virtual C100V to Avoid McAfee-Related Issues

  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
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MX LB / HA / Cluster ESA 380

We go to deploy our new ESA (2 devices) as per mentioned below plan, ESA01 is primary for company A and ESA02 is primary for company B.If ESA01 is down ESA02 will receive mail for company A using MX load balance. The same method for company B.We are ...

Security Management Virtual Appliance does not work

Hi to all,I installed for testing the SMA "Cisco Content Security Management Virtual Appliance M000V" at this address: https://software.cisco.com/download/release.html?mdfid=286283259&catid=268438162&softwareid=286283388&release=9.6.0&relind=AVAILABL...

Replace ESA 370s (clustered) with 680s

We have a couple of ESA370s in cluster. I want to replace them with 680s, but the mgmt IPs will be in a new vlan. The way I figure it: configure interfaces on 680s (don't want to import the 370 config due to the different mgmt ip) upgrade 680s to sa...

IronPort AsyncOs 9.6.0-042 : DNS query network error '[Errno 55] No buffer space available'

Hello Since we upgrade in AsyncOs  9.6.0-042, we are getting the following errors continuously : Warning: DNS query network error '[Errno 55] No buffer space available' to '184.94.241.19' looking up '1-03aa8ec5db99b6d05dcd0efbeed2204d.28.29.199.91.v1...

Receiving TLS messages

Our policy is to only implement Enforced TLS on outbound mail and have the business partner do the same on their end.  As the recipient, is there any way for me to tell if the sender is using Enforced or Preferred TLS?  

Resolved! AD/LDAP Group queries never work

Trying to get LDAP / Active Directory integration so we can use different policies for different AD users and groups.  Lets for example say in Active Directory I have the following structure: OU=Company Employees        OU=Accounting                ...

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