It's not a solution for low-traffic personal email servers. I've tested 3 domains in Postmaster Tools and for all 3 there's no data (I've added them a month ago or so - there should be data already)
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It's different from one AS to another. I've spent a lot of time maintaining reputation for my IP at a certain major ISP (no bulk email) and I'm still getting blocked from Google and others.
Then I got a VPS at Linode (for some other purpose), installed Postfix and emails were just working - no SPF or even reverse DNS set up.
No data to display at this time. Please come back later. Postmaster Tools requires that your domain satisfies certain conditions before data is visible for this chart. Refer to the help page for more details.