Emailing photos from your iPhone, iPad, or iPod touch is easier than ever from iOS 6 onward, because you can now attach pictures right from the mail composition screen, here’s how:
Tap and hold in the body of a mail message
Tap the right arrow button, then tap “Insert Photo or Video”
Find the picture to attach in Camera Roll, tap it, and send the email as usual
By repeating the process, you can attach multiple images to the email. Realistically, sending out a group of photos is quicker directly from the Camera Roll because you can easily select multiple images and compose an email directly from Photos.
Overall this is a really nice improvement. With prior versions of iOS, the process of attaching photos is based on using copy & paste and using multitasking to switch between Photos and Mail. Of course that still works in the newest iOS versons too, but the direct insert method outlined above is quite a bit faster and easier to explain.