there's already a similar request here. this feature can't be implemented soon enough. in the meantime, this is how i do it with some help from irfanview.
this program has a plugin called "Send by Email" which allows IrfanView to send images as emails. it saves info about the sender, recipients, smtp server & also maintains a mini address-book.. all this in an INI file, so it is portable.
here's the config part..
Access the function via menu
Fill in the relevant details