Cannot send emails from my IPad

I cannot send messages from my iPad. However, I can send them from my iPod. I am able to go to my browser, log onto my email account, and, am able to send emails that way. However, I cannot send them through the mail app on my iPad. Is there something wrong with my iPad. I verified all my mail settings with my internet provider and they say there is something wrong with Yahoo's outgoing mail server. If this is the case why can I send emails with my iPod and not my iPad. The settings are the same.