DLP policies are not blocking outbound emails

Products

• Data Loss Prevention Network Prevent for Email

Issue/Introduction

Symantec Data Loss Prevention (DLP)
Network Prevent for Email

After adding a Reusable Recipient Pattern to a policy as a white list, no emails are being blocked.

Manage > Policies > Sender/Recipient Patterns

Cause

A typo in the Sender/Recipient Pattern's "Email Address" and "URL Domains" fields caused the entire .com top level domain to be white listed.

The "Email Address" and "URL Domains" fields had an entry for "sxxxxxxxxxt,com" instead of "sxxxxxxxxxt.com".
The comma separator caused the entire .com top level domain to be white listed.

Resolution

Changed the Sender/Recipient Pattern's "Email Address" and "URL Domains" fields from "sxxxxxxxxxt,com" to "sxxxxxxxxxt.com".
That is, we replaced the comma separator in the domain name with a period.