In an app I have to send invite through contact details in iPhone. I know that contact details can be fetch by ABPeoplePickerNavigationController.And on a button action, I am able to get contact details. Now, on selecting any contact name I should be able to send a mail to that contact user.
Now, please share some information.
Check if the contact has email if it does then,
FYI : If the user hasn't set the email for particular contact then you won't be able to send email anyway :)