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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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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
  • 1500 Views
  • 2 replies
  • 0 Helpful votes

Resolved! ESA ASyncOS 11.0

Hi there,   For a customer of ours we're currently running ASyncOS version 10.0.2 on a physical C190 email security appliance. We want to update the appliance to ASyncOS version 11.0. We're running the appliance as a single unit in a datacenter and w...

Tom95 by • Visitor
  • 2649 Views
  • 3 replies
  • 0 Helpful votes

Sender group related query.

Hi Team,   We have whitelist in the sender group (On HAT table), we would like to know is it possible to cretate a separate whitelist to accept, which can be configured diffentenly? (security modifiaction can be done as per requriement).  and can be ...

bsrinu001 by • Level 2
  • 1292 Views
  • 1 replies
  • 0 Helpful votes

Resolved! Subject Header Filter Will Not Work

I want to create an outgoing content filter for asyncos 8.5.6 that will automatically encrypt any message containing confidential in the subject and it is to be case-insensitive.  To test it, I created a mail policy that only has a few email addresse...

webabc123 by • Level 3
  • 5088 Views
  • 7 replies
  • 0 Helpful votes

what if SMA goes down

Hello all,   I would like to know if SMA goes down or connection from ESAs to SMA goes down   What will happen to reports, logs, quarantine…?   Logs can be stored locally automatically if SMA goes down?! Current status of local logs is disabled    Ca...

ESA | Stopped by Reputation Filtering

Hi Team: I am trying to determine why a particular partner of ours is being blocked  total attempted 500+ messages in. Out of about 597 attempted messages, 384 are being stopped by reputation filtering. Is there something I can view in the logs to de...

Incoming content filter - ESA

I have created a content filter and having few questions. Also, please find the attachment for reference.1. How to make it as case insensitive.2. I have tested this content filter by using "Trace" option in GUI. But, I am unable to see the Action of ...

pbabu6001 by • Level 3
  • 4812 Views
  • 4 replies
  • 0 Helpful votes

FP attributed to .online domain

I'm running my own mail server on the domain: hexspoor.online Unfortunately suddenly i'm experiencing delivery problems whenever i try to send mail to organizations that use IronPort. My logs indicate that the messages are sent and accepted, but they...

Resolved! ESA Virtual Appliance LDAP Issues

I am currently testing the ESA virtual appliance, and I am having an issue with the LDAP setup. Now I have multiple other systems that use LDAP and they are working without with the same account so I do know that LDAP is working.   I use the wizard t...

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