Buy or Renew
Buy or Renew

Email Security

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation

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

Start a conversation

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
  • 791 Views
  • 2 replies
  • 0 Helpful votes

If / Then for TLS

Excuse my immaturity with the Email Security via Ironport C170.  My task is to have all outgoing mail to seek TLS verification with destination... if found then great, message sent.  IF NOT verified then Ironport sends as encrypted. My logic is this ...

Resolved! problem with shortening services in phishing mails

Hi, we are experiencing an increase of phishing mails containing shortened links from services like bit.ly, tinyurl.com or any other selfhosted solution. The ESA does a lookup only with the shortening service website which is mostly neutral and ther...

daro by • Level 1
  • 1224 Views
  • 2 replies
  • 0 Helpful votes

Ironport Outlook 2013 ?

I'm looking for the IronPort Outlook 2013 plugin.  I find plugins for Outlook 2010 I can download (updated in May 2013), but not finding 2013 download.  Does it exist?  Can anyone give me a pointer?ThanksGeoff Meissnerglmeissner@e-bind.com

Configuration assistant ESA

Dear Experts, We have 2 routes for two different domains (TLS & NON-TLS) Non-tls domains going through 203.101.X.X . 203.101.X.X is responsible to send receive for non tls domains.   Our Domains:                    abc.com                abc.com.pk...

False positives on spoofing policies

Hi all, We have a pair of ESA's and an MSA in our environment and I'm looking for suggestions on how to battle spoofing false positives from when our internal domain sends to another domain, which is auto forwarded to users back in the originating d...

sponder01 by • Level 1
  • 2081 Views
  • 7 replies
  • 0 Helpful votes

Replace all URLs

Without enabling URL filtering, would it be possible to rewrite all URLs received in emails on the external listener, say, if you wanted to just route them all to your own proxy? This wouldn't require enabling the URL filtering service on the ESA, wh...

Resolved! ESA Error message

Hello, My ESA send me this message so if some one can help me to more understund what does mean and what I should do The Critical message is: LDAP: query ldap_accept_Query.accept result LDAP server misconfigured or unreachable I will be thankful i...

Load more