title: Allowing current_user to email @user from users#show/
body: <p>I've set up Rails 4 ActionMailer to send me (as site admin) an email whenever a new user signs up (registrations#create - I'm using Devise).</p>
  
  <p>Now I would like for current_user to be able to email the user whose profile they are currently viewing. So in <code>users#show</code> I'd like to have a form that simply generates an email <code>:to @user.email</code>, <code>:from current_user.email</code> (optionally override-able via text input), and possibly a body to the message.</p>
  
  <p>A record of the message is not important. For this implementation I'm letting the users' inboxes handle all of the history. In fact I'd rather not store that data if it's possible to just pass it through the model/controller. If the addition of body text necessitates the use of a <code>MessagesController</code> then I would rather leave that out.</p>
  
  <p>Many thanks.</p>