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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
  • 866 Views
  • 2 replies
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Hi guys, I have a issue that I am hoping that you can help me fixes. Today we have our spam quarantine enable on our C390 and what we would like to have it this.. 1: We dont won't end users to have access to the gui so they can release the mails them...

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We currently host on premise with C190 appliances and are thinking about moving to the Cisco hosted cloud solution.  Does anyone have an estimate on which of the two deployment methods (cloud v on prem) are more widely deployed? thanks

KTD1 by Level 1
  • 1549 Views
  • 0 replies
  • 0 Helpful votes

Hello Are running the following filter for outgoing high volume mailes Highvolume: if header-repeats('mail-from', 500, 'outgoing') {                notify ("email@xxx.com"); Is it possible to limit the amout of notifications you get from the ESA?  As...

Hello, yesterday I noticed 1 thing:IronPort passed mail but in logs it's looking like rejected connection with a comment "Incoming connection (ICID 37639876) successfully accepted TLS protocol TLSv1.2 cipher ECDHE-RSA-AES128-GCM-SHA256.Can anyone exp...

GarrykZ by Level 1
  • 2186 Views
  • 4 replies
  • 0 Helpful votes

HI Dear, i have received multiple complain, When they send mail to a group in that group reciepeint count is 18 + and in CC aroun 35 ++. from that few people are not receiving mail. does any body help me here ? KR Moin

Hi,I've been playing with content filters based on SDR (Sender Domain Reputation). I can see that content filter allow me to filter messages based on general SDR score/verdict. If I do this, the log also contains an additional Threat Category, next t...

Is it possible to quarantine mails based on the threat category? I can see in the message details an entry "Threat Category: Phishing" and in the SMA I can search for them in the Sender Domain Reputation report also in the message tracking , but how ...