I realize everyone doesn't use an iPhone, but if you do, email the photo to yourself, drop in pics, documents or desktop, it should ask what file size to use when you send it - pick the medium (around 135kb) and it will attach easily without resizing. If you want to use a resizer with a conventional photo, download Light Image Resizer 5 (or any of several free downloads), and resize appropriately. Hassle free -
Regards,
Steve