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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
  • 544 Views
  • 2 replies
  • 0 Helpful votes

I have set up the following incoming content filter to bounce messages with executable content:executableFileBounce: if (attachment-filetype == "Executable")                      {                           bounce();                       }It works f...

Hello,I need to archived all emails going through the ironport gateways. For this purpose I'd like to use an linux dedicated archive box. This box needs to receive a copy of all email going thrue ironport. My question is :How on ironport can I duplic...

ccr_cisco by Level 1
  • 1461 Views
  • 1 replies
  • 0 Helpful votes

So far I have gotten 3 complaints of users trying to open their secure e-mails sent through our IronPort C160 appliance.  In all instances the terminology of these end users are to the effect that they download the HTML file to their computer, open i...

Hi,I've got an Ironport C600 6.5.3-007I set up one LDAP server profile with a maximum number of simultaneous connections of 50.When I run a netstat command in CLI it appears to have 150 LDAP connexions established to the server.Do you have any idea o...

I currently have a c300 device setup and running this has been setup prior to me coming to the buisness we have just purchased a new c360 which we are having installed at a new co location my question is can i take the current config from the c300 an...

simonpilch by Level 1
  • 2661 Views
  • 13 replies
  • 0 Helpful votes

We are in a process of having multiple ISP's . Our Public DNS for mail is currently hosted by AT&T and the second ISP being VerizonOur networking team will terminate both the ISP's to a device from Radware.How does one handle a multiple ISP scenario ...

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...

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