When I turn off email under settings on either my iPad or iPhone, no email comes in. However, when I turn it back on, all the email has collected and downloads, which I don't want. This can be hundreds of email messages over a period of time. Is there a way I can turn email off and not have it collect to be downloaded next time I turn email back on, or do I have to delete the account (which I'd prefer not to do)? Thanks.