From the Photos app you can email only up to five photos at once. Let me show you a nice little trick which will let you send more than five images in a single email.
If you are mostly using only one resample image option when resizing images, then you can change the default option to the option you are using the most.
Sometimes you get an email with a lot of attachments and saving them one after another to your computer can be really time consuming. Let's learn how to save all Outlook attachments at the same time.