How can I send out an HTML-rich email through a Case email address? I currently use gmail to send out through my case email (read: not Case's google apps), but it doesn't support sending out full HTML (images, etc.)

There has to be a way to do this, is there?

You can send HTML mail using Webmail at http://mail.case.edu in Internet Explorer.
When you compose a new message check the view source code box and paste in the html.

(I've only gotten this option to work in I.E. it doesn't seem to be supported in Firefox or Safari.)

another punt for me today. http://Fastmail.fm

They are a professional mail services group. I pay the 20$ a year thing, does great. Server side filtered IMAP4, with an extremely amazing entirely custom webmail setup. All my clients....it supports sending full HTML..and probably anything else you like. I believe they are based in Australia. -Everything- i have is forwarded to them and put in its proper place. It may be a discount if your referred too..not sure. Me and a friend both bought from them, and don't have to worry about all the other mails now...just thought I'd pass along the message.

screenshot

All CSS, so you can change colors etc if you dislike it. PHP too. :D