It seems like all my emails that are older than 3 days old or so are automatically getting deleted. I'd like to be able to access my emails that are older than 3 days. For example; I had an email sent to me on Monday. This morning I opened up my "mail" app and it was not there. The only email in my inbox were emails from yesterday and today. How do I change the setting to retain emails that are up to say 7 days old ? Thanks for any help I get on this.