It would be great if the function "send mail" could be expanded:
1. There may be a recipient address specified
2. There may be the subject specified
3. In addition to the image the name of the pc and the user
This would depend a lot on the used email client, for Microsoft Office we already have this configurable via the greenshot.ini (if you open this jn an editor you should be able to find the settings)
For other email clients this is not easily possible.