Vetter allows you to safely determine whether an email you are about to send (with a specific sender address, subject line and body) will be marked as spam by your audiences’ email service providers. Vetter sends your email to multiple email accounts per service provider (Gmail, Hotmail/Outlook/Live and Yahoo) and then checks each of these accounts to verify if your email reached their respective inboxes, or if it was spammed. Vetter then returns a scorecard along with a brief analysis of your email’s performance.