It seem that you can only send URL-based image in the body section. You would have to send it by attachment otherwise.

Since the image need to be uploaded only once to GMail, I don't see how the number of receipients would affect the processing time.

>I have two questions.
>
>1. How can I insert a picture (currently in clipboard) into the gmail message? It doesn't seem to let it insert.
>
>2. Would 32K picrture slow down sending mail to a big group?