I just changed from Windows to OS X Mavericks with Apple Mail App 7.3. The first thing I'm wondering about is that I cannot disable the automation to mark an email as read by default when I just clicked on it. Is there any way to do so?
I found TruePreview. But the tool does not support Mail 7.3 any more. Another solution would be to use a different mail client like Thunderbird. But there I miss the integration of the address book and the synchronisation with my iPhone and iPad.