How can I add a contact form into my post content?

Open the settings page for Contact Form 7, and then open the contact form you want to add.

Each contact form has its own tag (shortcode), such as [contact-form-7 id="1234" title="Contact form 1"]. To insert the contact form into your post, copy the shortcode and paste it into the post content.

Short code sample

Just another contact form plugin for WordPress. Simple but flexible.