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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

Our licensing expires in two weeks and we're getting a new C160 to replace the C10 that we've had for almost 3 years.Can anyone advise me as to what kind of performance increase can we expect to see in moving to the newer platform? I'd be interested ...

What do you guys have your levels set to? Ours are currently 75/35 (drop/quarantine for the actions), but we've just had to lower it again to 75/30 due to slightly increasing levels of spam getting through. This is getting rather close to the lower l...

We are moving from Tumbleweed to Ironport and wondering if there is a way to eliminate duplicate notifications. We sometimes setup a notification for particular email addresses during holidays, but had the ability in Tumbleweed to absorb any duplica...

jwiegert1 by Level 1
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We have a requirement that any emails to a specific domain with certain attachments will be required to be blocked. The problem is, most of these attachments have no file extension. Anyone have a creative way to include this into an attachment rule...

jwiegert1 by Level 1
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  • 6 replies
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We have a message filter to catch any Social Security Numbers that are sent outbound. We also have content filters to catch certain PHI terms or emails that contain the term {secure}. If the email is caught, it is encrypted and sent out with CRES. ...

jwiegert1 by Level 1
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Hello All,I didnt see any articles when I searched, so I thought I would just ask the question. Anyone here completed a migration from Postini to Ironport? I have my C150 racked and configured and I am looking at completing the migration this weeke...

I have been working on an problem that I cannot seem to get an answer to.I have a c300 set up with local quarantine. I turned on the EUQ and the SL/BL options.I have a content filter;Spam_Review: if (dictionary-match("Spam_Review", 2)) { strip-header...

So I found the IronPort page where it instructs you how to upgrade using the CLI, here are the steps:As a best practice, IronPort recommends preparing for an upgrade by taking the following steps:1. Save the XML configuration file off of the applianc...

I use Ironports Mail Flow Center V.1.4.0, but have trouble with some reports:An error has occured:The following report(s) failed during their scheduled run time:'Volume Report by Domain - weekly' - Due to error: _mysql_exceptions.InternalError - (3, ...