From : delivery
Subject : Important information regarding your loan: ID EHPI883
Your refinance application has been accepted. We are ready to give you a loan.
After further review, our lenders have esstablished your locked rate as low as 3.87%
Please finalize everything by visiting our Secure Web-Form
Upon receiving your submission you will be contacted shortly via phone/email.
This mail is SPAM of course, but it's not obvious that it is. All that it has is regular text from an ordinary email, and asks you to click on a link.
And Gmail marked it as SPAM. In spite of no "obvious spam words". In spite of no "nonsensical words or phrases"