This will not work with FileMaker out of the box. FileMaker does not support HTML email, inline images and does not support multiple attachments.
That being said there are 3rd party plugins that do all of these things. I have used CNS's SMTPit, but there are quite a few other email plugins. Formatting emails with HTML or inline images is not trivial, but can be done. Email HTML is not quite web HTML, but it is good if you know web HTML before diving in. Good luck!
Thanks for the info Taylor. I assumed that would be the case but thought i would throw it out there anyway.