How do I change the page zoom so the emails stay at "110" or "125" like in a browser setting?

Why do different emails come in at different magnifications? I get emails from a real estate agent that I have to do a control & + to zoom in on the email so I can read it normally. Why is there not a setting to have all emails at one "zoom" setting? It would be really helpful!! Especially for us older users. Also, when I add a folder to my email, why can't I add it to the list of folders already there by default? Right now I have to add the folder to the inbox and then drag it down to the other folders. When I do this they don't go alphabetically, they go to the bottom of the list. They should drop into alphabetical order. Thanks for your help.