Startup Idea : Is server sending email to ppls' spam folders?

Build a service that allowed users to send an email from their server to 100's of email addresses that you have setup via yahoo, gmail, etc. And then after the email is sent your script logs to all those email accounts test to see what went into spam. Then report the results back to the owner. Your service could ping a script, that you made, on their server to send the emails. When they signup to your service they install your script - email-ping.php - on their server and then they enter the location of email ping script into your saas control panel. Add a nice bright and colorful stats dashboard and it would be a winner. Definitely worth $9.95 month.