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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
  • 871 Views
  • 2 replies
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We turned on TLS Preferred for all Outbound messgae on our 2 C650's this afternoon, and I am trying to get my head round the figures on the TLS Status Page.Figures for the last hour show the following within the "TLS Connections" GUI on one of our b...

How can I get 2 C350's to share their config so I dont have to change settings on each appliance? I am a total newb to Ironport administration and welcome any help, tips, etc.I'm pouring over the admin guides in the mean time.Thanks in advance.Ismael

HiIm currently updating one of my C150's boxes from 6.1.0-306 to 6.3.5-003 and it has been going for just over 1hr now at it is only at 40%. Its never taken this long before usally around 30mins or so to do one box.Any clue why this may be taking so ...

jparker32 by Level 1
  • 1810 Views
  • 5 replies
  • 0 Helpful votes

When a recipient receives an encrypted email from me via our c350 and replies I have to be registered and enter a password to decrypt the reply. Does anyone know of a way that the user (me) who generated the encrypted email will receive the reply in ...

I'm a little confused about placing our logo on the Encrypted Envelope.We wish to have it presented so the recipient clearly sees the message is from "us" and doesn't get confused seeing the Cisco Logo.How should this be configured on the c350

Hi There,I couldn't find an answer to this question in the Knowledge base, so hopefully someone here can help me out.Is there a way to get a message filter or content filter to know what the recipient user has done to a message in their Safelist/Bloc...

I access my appliance from several machines, and sometimes after the upgrade to 6.1.0-307 (I tjhink) my Monitor -> Quarantine page renders in different sizes. I have a widescreen monitor that I do most of my work from and use a laptop at home for so...

Hi all! I'm attempting to add a new filter in the IronPort and apparently I have something wrong. I keep getting this error message:An error occurred during processing: filter:2:30:illegal characterI understand WHAT it's saying, but not where. Is ...

I am setting up the End User Quarantine so that the users can access the quarantine and check the message quarantined addressed to them. I have everything working with LDAP and the Logon is working but I haven't be able to find a way to send out noti...