email recovery

Hello there,
i have problem - my son deleted my emails from imap server. Only device which was offline - was my ipad. I have great number of emails there. Is there some way to export mails from device? Till now i have to stay offline to have all my communication in ipad. Pleas help it is very important for me. I read about som app for jailbreaked iphone but it was old discussion. Maybe some new advices. Thx