Protect against spoofing & phishing, and help prevent messages from being marked as spam.

https://apps.google.com/supportwidget/articlehome?article_url=https%3A%2F%2Fsupport.google.com%2Fa%2Fanswer%2F180504&product_context=180504&product_name=UnuFlow&trigger_context=a

NOTE: These instructions are for Google Workspace email addresses. Instructions are accurate except for the link in step 2 that goes to Apps > Google Workspace > Gmail

The updated url is: https://admin.google.com/ac/apps/gmail/authenticateemail