title: How to track link click in email sent to user with php mail function
body: <p>I have a contact form with Email, Message, Name fields.When user filled this info he/she received like autentification email with link to go and confirm.in this period info shouldnt be filled in Database.When user go with this link then info should be filled in Db with ajax php mail.</p>
  
  <p>My question is how can track this click and when this link is clicked make an ajax request to fill info to Db and send an email with the Details.Am using wordpress, for mail using php mail function.</p>