I have a client who wants to store 6 months of e-mails on his phone. He's currently using Outlook which won't store more than a 1000 e-mails... he's looking for something which will store 6 months, which for him is a lot of e-mails. Is there an app which will do this and let him search them, up to the limits of space on the phone? I've tested a few but without success. It's an IMAP account through Yahoo.