Contactform 7 not receiving phone number in email

Hi there, I have setup Contactform 7, followed a tutorial and all information is showing that I want to receive of the contact form. However in the email I receive when someone leaves his information the phone number is not showing. If you put the phone number in contact form, it wont show in the email. Any ideas? Below is how I put the contact form.

<label> Volledige Naam
    [text* your-name] </label>

<label> Telefoonnummer ( phone number )
    [tel* contact] </label>

<label> Email
    [email* your-email] </label>

<label> Onderwerp
    [text* your-subject] </label>

<label> Wat is je vraag? 
    [textarea your-message] </label>

[submit "Verzenden"]