You should also change the contact email unless you want your customers to send email to another guy.

You can change the email of the contact form by:

Step1 : Go to Admin >Structure >Contact email (admin/build/contact).

Step2 : Click to edit links.

Master Drupal in 7 hours - Basic Customization - Change contact email_01

Step3 : Please change the information you need, then click on” save”.

Master Drupal in 7 hours - Basic Customization - Change contact email_02