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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.

 

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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
  • 544 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Incorrect message size

Hi Cisco Support,   May we request for your assistance as we are having a weird problem on message tracking regarding "Message Size". We send an 15MB file but on message tracking it add another 5MB file size to make it 20MB even we sent an 15MB attac...

Resolved! Replace body text with variables

I'm trying to modify certain text in a message body to include information related to the message stored in variables.  I know about headers, notifications, etc.  I'm specifically referring to the edit-body-text command in the CLI message filter.   I...

drubino by • Level 1
  • 2519 Views
  • 1 replies
  • 0 Helpful votes

Phishing e-mails coming in, going out...

For the past twelve months I have seen an increase in phishing e-mails that are coming into our environment from external senders, yes they are being scanned for SPAM by our C670s and consistantly getting missed.  We also have internal accounts that ...

Resolved! Cisco C000V to C100V

We have been running a trial of the ESA C000V and recently purchased Premium bundled services with AMP. I was looking to deploy the C100V, which I thought was basically export the config from the trial VM to this new VM but it did not work. After the...

ESA AMP UNSCANNABLE issue

Hi All, I have newly installed ESA in my environment. In my ESA when an incoming email comes with an excel or pdf attachment the AMP gives the verdict UNSCANNABLE. Please could you help me how to scan documents files with ESA AMP. Wed Jul  5 11:25:...

Cant scan MSG file attactment

Hi   I have a problem in some mails that contains an attachment files like msg. In the tracking message it tells my that:   "encountered message scanning error: coercing to Unicode: need string or buffer, NoneType found"  is there any problem to scan...

System files eating up all my space

I am constantly getting this warning on my C170 ESA: The Warning message is: 75% of the disk quota for Miscellaneous services(logs, configuration file, and so on) is used. You can either increase the disk quota for Miscellaneous services or manually...

Greg Hopp by • Level 1
  • 6563 Views
  • 3 replies
  • 0 Helpful votes

Resolved! Is there workaround about Vulnerability sweet32 on Cisco ESA?

Hello Team,   The last week We did a vulnerability scanning and it show us one vulnerability on Cisco ESA with firmware 10.0.1. (The vulnerability is "Sweet32").   I am researching some workaround, and I have found a bug “CSCvb48533, Known affected r...

content filter vs dmarc

Hi All,   Is it possible to use content filters to do what DMARC does? IF possible, what are the pro's and the cons?  Bear in mind that SPF and DKIM are configured and DMARC not yet.   Many thanx,   Shaam

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