Best practice question: ActiveMailer

I'm new to Rails but not MVC programming (very familiar with Struts for instance.) I'm currently modifying an existing Rails app but I have some questions about the design decisions that were made in their code.

The app I'm looking at has an ActiveMailer class but its stored in the model subdirectory. Does this sound right to people? IMO ActiveMailer resembles a controller more then it does a model. In fact, since its deciding which view to render based on the action, its pretty much exactly like a classic controller.

Apparently Rails when use use the generate script in rails it puts it in the model directory? Can someone explain the reasoning behind this? IMO its not a very intuitive choice.