From the RoboSizer website:
This is the image I wanted to attach to an email which I sent to myself as a test. This is the image I received in the email as per my settings in the RoboSizer UI. This is the RoboSizer User Interface.Automatically resize and optimize your pictures.
RoboSizer offers fully automatic, on-the-fly image optimization that completely eliminates the need to manually resize your photos. Unlike other resizing applications, RoboSizer works in real-time and automatically resizes images when they need to be resized!
Just attach your images to an email, instant message or upload them to the web, and RoboSizer will automatically optimize them for you! There is nothing to configure, no additional steps to take - just send your images like you always do and RoboSizer will do the rest!