Replace image attachments with resized versions

[Brian Cluff]

I've got a customer that likes to send out newsletters with images in 
them, but they are under the opinion that they are too stupid to learn 
anything new on the computer and are stubborn to the point that they 
won't even attempt to learn something as basic and easy as resizing an 
image.  (Which is particularly frustrating for me because it would help 
them in their profession too... arg!)

So, in order to keep them from sending out thousands of 5+ meg emails a 
couple of times a month, I would like to put a filter in place that will 
pull the images out of their message, resize them and put them back 
before sending them off to the mailing list.

I can see all the pieces of the puzzle out there, but I would prefer to 
not reinvent the wheel if I don't have to.

Does anyone know of something out there that can do what I need?

Brian Cluff