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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
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Hi,With moving IronPort forums to Cisco community I cannot find very important option:"view all new threads from my last visit"I am missing something or this option doesn't exists ?Thanks,Igor

We are having major issues with the outlook plugin... OutlookDesktopFlag_6.5.0_003.msiAll issues are reported by Office 2003 users.We use a CRM program called Touche, which is re-branded SolvIt from Prosper Business Solutions (sold as Touche by Harla...

I was just wondering how the rest of the Nation handles their IronPort downtimes? Are they a big production, scheduled, notification to clients, approved by management? Or are they stealthy, done behind the scenes, nobody is aware of the changes?I ...

Hi all.Is there any way to add a static host entry to a C300 ESA?I could not find anything like this in the GUI/CLI.Every mail that goes from our internal mail gateways out through the C300s gets tagged with a Received header like this:Received: from...

Hi All, I simply need to drop replies and forwards (RE: & FW:) that do not have any text that follows the RE: & FW: 's.I have created incoming content filter rules, and they work for "empty subject" mails. When the subject is RE: and then bla...

Hey everyone,We are trialing the c660 and so far am very impressed. I ran into a problem that I was hoping someone may have also ran into. I use LDAP to do alias routing to my backend mail stores. When the alias is done, the message recipient is chan...