Send Email with attachment in iPhone

We need MessageUI framework to send email. Sending Email can not be tested using iPhone simulator. The reason is simulator does not include a mail app. The application should be installed in actual device and tested. In simulator, it displays a successful message that email has been sent but it just an indicator that no other problem with source code.

NSData *audioFile = [[NSData alloc]initWithContentsOfURL:temporaryRecFile];

MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc]init];
mailer.mailComposeDelegate = self;
[mailer setSubject:@"Greeting Message"];
NSArray *toReceipients = [NSArray arrayWithObjects:@"recepient_mail_address", nil];
[mailer setToRecipients:toReceipients];
[mailer addAttachmentData:audioFile mimeType:@"audio/caf" fileName:@"VoiceFile.caf"];
[mailer setMessageBody:@"My greetings for you" isHTML:NO];

[self presentModalViewController:mailer animated:YES];
[mailer release];
}
else
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Failure" message:@"Device does not support" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];