Email Form Use Case and Work Flow

The following diagram and use case illustrate how contact form works from a user's perspective.

Work Flow

A user wants to contact you and follows a link to your contact form (contact.pl) from your website.
The email form (contact.pl) gives the user a form to fill in with fields such as from, subject, name, and body.
The user fills in the form and submits it back to contact.pl.
Contact form validates the input and shows the user the form again with error messages if the form was not filled in completely or if it was filled in incorrectly.
The user makes any need corrections or additions and submits the form.
Given a complete form, contact form sends email to you.
Contact form shows an email sent confirmation to the user.