Emails are sent to Default Address not in Recipient's address

Hi! Been searching in the forums regarding this issue but no luck. Here's my concern: I noticed that the email sent from the contact forms in my website are not sent to the recipients address but rather to the Default address of the website. When I tracked the emails in 'Track Delivery', it says 'accepted' but the "delivered to" address is different from the recipient's address. see screenshot.