Incident Summary: Email Delivery Failure to Echoworx

Products

• Email Security.cloud

Issue/Introduction

Incident Overview

• Incident Date: June 6, 2026

• Issue: Emails related to specific cases were failing to deliver to Echoworx.

• Current Status: Resolved

Cause

The delivery failure on June 6, 2026, was traced back to a certificate issue on the receiver's end (Echoworx). Symantec Email Security.cloud enforces secure TLS encryption when routing emails to Echoworx. Because the underlying certificate was misconfigured, the secure handshake failed, causing Symantec to hold or drop the connection to prevent unsecured data transmission.

Resolution

 

• The Echoworx technical team identified and resolved the certificate issue on their servers.

• Following the certificate fix, secure TLS communication was re-established.

• Result: Delayed and new emails are now processing and delivering successfully without further errors.