This link only appears if a user has enabled the contact form for him/herself.  Visitors (anonymous users) may not make use a member's personal contact form.  This helps prevent spam and other such anonymous annoyances.

Clicking this link will take a user to a form where he or she may send an e-mail.  It deserves to me mentioned here (and elsewhere) that your e-mail address is not exposed by the system anywhere.  Other users may send you e-mail through the Contact module, but they will not have direct access to your e-mail address unless, of course, you choose to reply.

• Please note:  Your e-mail address will be revealed to the user who receives your message!  There is no anonymous messaging available to users.  In other words, yes, you will be held accountable for your actions.

Every message sent via Contact will feature the following header:

Username,

    Example-User (http://wwandi.com/users/example-user) has sent you a message via your
    contact form (http://wwandi.com/user/[your uid]/contact) at Wordsmiths, Worldsmiths,
    and Ink.

    If you don't want to receive such e-mails, you can change your settings at 
    http://wwandi.com/users/username.

    Message:

This is followed by the body of the message.