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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
  • 880 Views
  • 2 replies
  • 0 Helpful votes

ESA CASE engine Log

Hi All, I need to save on an external repository only the antispam verdit logs taking a look on the mail_logs 2 CASE logs are present by default is also present an antispam log, but no case verdict information are reported inside of this file in th...

CLOUD EMAIL ROUTING THROUGH CISCO CES

Hello Dear, we have an inhouse Mdaemon mail server which is used to route emails of 5 of our domains.we have configured cisco CES to secure our emails. All incoming emails from outside first hit ESA which scans and deliver to Mdaemon which is routing...

mohsinzzz by • Level 1
  • 1729 Views
  • 2 replies
  • 0 Helpful votes

SNMPv3 Encryption algorithm on ESA

Hello, In User Guide of ESA, showed that the encryption algorithm can be AES (recommended) or DES of SNMPv3.I would like to check that what is the AES option (i.e., 128, 192 and 256) in SNMPv3 configuration of ESA. Thanks, Regards,Thaung

ESA URL filtering logging

I am following the "ESA URL Filtering Enablement and Best Practices" guide: http://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118775-technote-esa-00.html It works as shown BUT when I send a message with TWO OR MORE links, ...

Resolved! Virtual Ironport on Dell hardware

Does anyone have experience running the Ironport ESA VMs on a Dell server compared to a UCS server? What kind of support do you get? We would like to use Dell servers as that is our standard for our datacenter, but we're concerned about the level of ...

bschimm by • Level 1
  • 2289 Views
  • 6 replies
  • 0 Helpful votes

Resolved! Disable SSH Weak Ciphers

We noticed that the SSH server of Cisco ESA is configured to use the weak encryption algorithms (arcfour, arcfour128 & arcfour256, cbc) and mac algorithms (hmac-sha1 and hmac-md5). My question is: How to disable SHA1 key algorithms?How to disable CBC...

rab ngl by • Level 1
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