After a few days my older emails on iPad2 stop showing in the inbox. Dont find any clue where they went.
Does the mail program store the older emails elsewhere? How can i show all the emails and not just the newer ones?
If you have an Exchange account or even a Gmail account configured as an Exchange account, there is an option in the email settings for Exchange to only sync up to a certain number of days worth of email. By default, it it set to 3 days. You can change this by going to Settings > Mail, Contacts & Calendars, tap on the email account in question and change the "Mail Days to Sync" option from 3 days to whatever you desire (I use No Limit).
Hope this helps.