How do I whitelist phishing sendouts in G Suite?

This is the recommended setting if you do not have a cloud-based spam filter in front of G Suite. The setting may take up to an hour to propagate to all users, so wait at least an hour before testing.

1. Log in to https://admin.google.com. You should see a screen as shown below. This is your Google Admin console.
2. Go to Apps.
3. Go to GSuite. 
4. Go to Gmail.
5. Scroll to the bottom of the Gmail page and select Advanced Settings.
6. On the left, select your domain.
7. Scroll to the Email Whitelist setting in the Spam section. Or, in the search field, enter Email Whitelist
8. Enter the following IP networks:
   • IPv4: 185.163.84.0/22
   • IPv6: 2a0b:6800::/29
9. Scroll down to the bottom of the page, and click Save.

Note: It can take up to an hour for any changes to take effect. You can track changes in the Admin console audit log.