Richard Archambault on "[Plugin: Jetpack by WordPress.com] Contact forms not going to mailbox"

Can you try the instructions on this site, to test the email on your server and WordPress installation?

https://rtcamp.com/tutorials/php/test-email-sending/

If you have trouble with the first part, you can ask your host for help, but you can still try this plugin meanwhile:

http://wordpress.org/extend/plugins/check-email/

Let me know what you turn up.