How to enable IMAP Push:
1. at application level (general settings)Menu -> Settings -> Mail, receiving -> scroll down and enable "IMAP Push"
> screenshot #12. at account level (account settings)When setting up a new account, IMAP Push (if supported by the server) is enabled for the default incoming message folder, but is disabled for the account, giving you more control.
To enable IMAP Push, all you need to do is turn on “IMAP Push” for the account:
Long press an account -> Options and folders -> account options -> enable "IMAP Push"
> screenshot #23. at specific folder levelTo enable or disable IMAP Push for a specific folder:
Long press an account -> Options and folders -> Folders - > scroll to a particular folder, and tap the settings icon (wheel) to the right of the folder’s name -> enable checkbox "Use IMAP Push"
> screenshot #3You will find these (and many more) information on the FAQ page:
http://www.aqua-mail.com/?page_id=227> just search on the page for "IMAP Push"