How to receive emails after inbox has been full?

I think on my iPhone my email inbox was full as no emails being sent to me were coming through, I have now deleted all my emails ever received but I have not got the emails that I have missed when my inbox was full? I'm expecting an important email so any help would be appreciated!

Make sure you have a connection to Wi-Fi, 3G or 4G. It also depends on your mail settings and whether or not you've set it to "push" new emails… So check that. You can also refresh your inbox by pulling/dragging the list & holding it or by clicking the arrow on the bottom left of the inbox.

Maybe your phone needs to be reset. You do this by holding the home screen and the power button at the same time. When the power off screen pops up, keep holding & ignore the screen - it will go away… Keep holding… The screen will turn black for a few seconds then a white apple will appear. When you see the white apple you can let go of the buttons. Your phone will automatically boot up and this could be the fix. It's like when your computer is goofing up & you have to restart it to get it to work properly… Same thing but for your phone.