Overview
Enhanced pre-delivery message scanning slightly delays the delivery of suspicious emails to perform more thorough security checks. This improves Gmail's ability to detect sophisticated threats — including zero-day phishing links, malware embedded in documents, and evasive self-modifying malware — that might otherwise bypass standard filters.
Prerequisites
Super Admin access to the Google Admin console
Gmail Settings administrator privilege
Instructions
Sign in to the Google Admin console
Navigate to Apps > Google Workspace > Gmail > Spam, Phishing and Malware
Select the organizational unit you want to apply this setting to
Scroll to Enhanced pre-delivery message scanning
Check the box to enable the setting
Click Save
Note: This setting works best when combined with other Gmail safety protections such as attachment protection, link and image scanning, and spoofing and authentication settings. See Configure Attachment Protection, Configure Link and Image Protection, and Enable Automatic Security Updates for related settings.