Setting up a Gmail automatic out-of-office email here isn't complicated, although it's not as straightforward as doing it from the mobile app. Here's how you can set it up on a computer: ...

It was overwhelming, time-consuming, and unproductive until I found the magic of Gmail rules. These helpers sort, filter, and organize my inbox on my desktop computer and Android phone.

I talked him through how to set up Gmail on his iPhone but what is displayed in the mail app (according to him) is the PROMOTIONAL emails tab.