Motorola Razr :: Receive A New Email More Than 30 Minutes After Manually Check The Push Email Does Not Work?

I have problem with email on my Motorola Razr. (not gmail, not corporate, just a email)I have setup email account and:-In Data push account is checked.-Sync over Wi-Fi only is unchecked-background data is checked- data Enabled is checked- No data saver checked.I can check my email manually it is work.- If I receive a new email up to 30(not sure) minutes after manually checking the push email is working fine i get it on my phone.- But if I receive a new email more than 30 minutes after manually check the push email does not work. I do no receive any emails until manually checking.Email server works fine I use it on other phone an