The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

Sender ID

A set of standard practices for authenticating email. If the sender’s domain owner participates in Sender ID, the recipient MTA can check for forged return addresses. Symantec Brightmail Gateway allows you to specify an action for messages that fail Sender ID authentication.