With Contact Form 7 you can easily create contact forms and you can display them on your page via shortcode or by using the Visual Composer Contact Form 7 element. After you installed the plugin a new item will appear in the admin menu, called Contact. To create a new contact form go to the Contact menu then click on the Add New button at the top or you can use one of the pre-defined ones.
In the editor you can make your form by click on the field button you want (text, email, URL, tel, etc), then specify the field settings.
Click on the Mail tab to set your mail settings (To address, From address, Subject, Additional Headers, Message Body, and File Attachments).
In the Messages tab you can edit messages used in specific situations (eg Sender’s message was sent successfully, Sender’s message failed to send, There is a field that the sender must fill in, etc). When you set everything click on the Save button at the right.
You can find more information about the plugin on contactform7.com