NSString *url = [NSString stringWithString: @"mailto:?subject=Wallpapers%203d%20App&body=Have%20fun%20with%20this%20unique%20wallpaper%20app"];
[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];
I am using this code to open the mail app at iphone in order the user to send an email. I want to add a url link or image(with url linke) inside the mail which the user sends so when his friend opens his email and taps to the link he will be redirected to the app store and download the app.