Email Security

cancel
Showing results for 
Search instead for 
Did you mean: 
cancel

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

We are in CES and recently upgraded to: C100V13.5.2-03625 Sep 2020 00:00 (GMT -04:00)14 Oct 2020 15:49 (GMT -04:00) We are seeing entries such as these in our mail log indicating rejected connections: Fri Nov 20 14:11:47 2020 Info: New CPQ ICID 66802...

I am getting seemingly random messages being accepted, are processed through work queue but then stop at a READY state. Others with the same subject, sender, recipient, body will proceed on and get delivered.0 I can perform a SHOWMESSAGE which means ...

Goodevening I'm handling a strange issue Mail is received on our cisco ESA which have a connection towards our O365 tenant One external sender sends mail messages towards one of our O365 users, and this mail bounces with the above error message from ...

rolelael by Level 1
  • 7461 Views
  • 3 replies
  • 5 Helpful votes

Guys,I have a problem, I configured LDAP integration with my cluster ESA. ESA and LDAP(AD) talk each other, Test Server and Test Query return PASS. I used this guide to configure it: https://www.cisco.com/c/en/us/support/docs/security/email-security-...

mikiNet by Level 1
  • 2747 Views
  • 2 replies
  • 0 Helpful votes

Hi comunity,   I have a quiestion about the shutting down of an Ironport ESA C370. In a CLI session, i write the "shutdown" command. After thar, the message "Enter the number of seconds to wait before forcibly closing connections. [30]>" appears. I h...

Dear All,  I would like to update the   IronPort spam quarantine message "Please contact Helpdesk (xxx@ccc.aa) to have them sent to your Inbox."  another  url IronPort Spam Quarantine Notification The message(s) below have been blocked by your admini...

Currently we are facing the issue that there is an inconsistency found by the number of mails that is in the file analysis quarantine ( max of 1 hour = default value ) and the number of samples being scanned in treatgrid ( we have a threatgrid login ...

rolelael by Level 1
  • 2121 Views
  • 2 replies
  • 5 Helpful votes