check if email exists via curl / jquerry on outlook

Hello, I want to make a php program to check if an email exists without sending an email. The purpose is: if someone come on our website if the email doesnt exists on hotmail outlook, we inform him straight away. The idea is via php curl / jquerry to go on this page: [login to view URL] Fill in an email adress outlook on the field to create an email, go out the form. Normally outlook check directluy for you and tell you if the email exist or not without submit the email. I think 1 or 2 hours works is sufficient to make this work if you know already the technic. I want a simple function we put on the function php the email and the script return if the email exists or not.