I added my domain to Postmaster Tools and have my domain verified.
Unfortunately when I tried to check the data (it is already 3 days until today), it showed No data to display at this time. Please come back later message.
Actually SPF & DKIM are already set up correctly (below is my Check MX result).
Anybody know how to solve this issue?
As far as I’m aware, you need to have a minimum level of activity (of the order of several hundred messages) before it will show up. I’m not sure why, but it may be to limit the ability to identify individuals. My own very active accounts still get some of these “no data” days.
Also bear in mind that google postmaster tools is a buggy mess that hardly works at the best of times, for example a spam rating of “bad” will often coincide with a spam reporting rate of zero. It’s also about the only google service that has no support channel whatsoever.