Not showing recent emails on iPhone 4S mail app

Previously it wasnt showing any emails at all and kept saying "cannot get mail - connection to the server failed" but now it started to show my emails out of the blue but its not showing any of my recent emails when I set it to "no limit" on "mail days to sync" its just showing 21 old emails from a year ago. I would like to see all my emails and not just mails that's a month recent or a year old.If I set it to any other days besides "no limit" it's fine but I want to see all my emails in my inbox like before. Please fix this issue!