I'd suggest looking for a "resize" tab to click on your pics, and then see if you can change the pixels (usually horizontal and vertical, and I change the larger of the two to 1200). Don't change the "file size", but change the pixels.
Then you can either "save" or "save as" a new file.
I'd rather send a smaller file in an email too, and these huge files are not much use to anyone except those who want to blow up pics to wall sizes (IMO).