I built my Website based on WordPress. I set up also a contact form plugin ("Clean and Simple Contact Form" http://www.megnicholas.co.uk/wordpress-plugins/clean-and-simple-contact-form)
Unfortunately, I cannot get any email 1) if an user uses contact form and send email directly and 2) if any user gives comments on my Website.
I communicated with the developer of this plugin. He assumes that you (dynadot) blocks emails to external domains (my email provider is Microsoft).
Please investigate on this problem, why I cannot get any email by using WordPress Website. The email process (out of Website) works well.