The native Android email app does not allow you to resize your pictures. However, before you email photos, you can alter your images in a number of ways. You can change your camera settings, crop images in the Gallery app or use a third-party image editing app. This can be useful if you need to send multiple images or if the recipient of your email can only receive attachments up to a certain size. Writer Bio

Can I Resize Pics With Android Email  - 6