This is the code to send mail. But How will we get back result saying sent successfully ?
public static void sendFeedback(Context paramContext) {
    Intent localIntent = new Intent(Intent.ACTION_SEND);
    localIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{"xyz@mm.com"});
    localIntent.putExtra(Intent.EXTRA_CC, "");
    String str = null;
    try {
        str = paramContext.getPackageManager().getPackageInfo(paramContext.getPackageName(), 0).versionName;
        localIntent.putExtra(Intent.EXTRA_SUBJECT, "App");
        localIntent.setType("message/rfc822");
        paramContext.startActivity(Intent.createChooser(localIntent, "Choose an Email client :"));
    } catch (Exception e) {
        Log.d("OpenFeedback", e.getMessage());
    }
}    
 
    