I am working on some integration and uses sendgrid email validation as part of it. The issue i am facing is the sendgrid API send 'RISKY' response to some valid email addresses. I looked into their documentation but there is not much on what bases they identify the email addresses as Invalid or Risky. Can some one help please.
Looked in the sendgrid API documentation but there is not much there to detail how they grade the email addresses.