Your talking to peers here. We would need more info to offer suggestions. Also post if you are a Yahoo/VERIZON email user.
Assuming your IPAD is accessing the email over your home WIFI, then their is something not working with your email client on your pc/mac/whatever. Basic settings are described at http://verizon.com/emailsettings . Lots of other configurations and sometimes incompatibilities have been discussed on these forums.
What Device and what client? If possible post all you NON-confidential email settings. DO NOT POST your email id or password.