We measure IBPR regularly as one of our many ongoing "quality control" checks. It varies a bit week-to-week, but ours is above 90% (like pretty much everyone else)… and often comfortably in the 95% range.
But IBPR just isn't that important (see #2). Probably most email services are in the same range.
So some competitors like to pretend IBPR is important, because to the uninitiated it "looks big".
However, a service's IBPR says literally nothing about how many times your eflyer blast will be opened/viewed. And eyeballs-on-your-flyer is what actually matters, right?
That's why you need an "email open rate" report to know how your email flyer blast performed… see #3 below.
Since (as discussed above) the Inbox Placement Rate gives literally zero information about how many times your email blast was opened, you should expect your vendor to provide a report showing you the actual, measured number of times your email blast was opened… no calculations padding the total… no obfuscation with non-email numbers added to the actual email number.
You don't want to hitch your marketing wagon to a "blacklisted" email service. So we suggest you periodically verify that your email service has not been added to major email reputation blacklists, for example at:
Some email platforms such as Gmail offer Postmaster tools that give volume emailers a way to monitor their own domain reputation and IP reputation.
As you can see, Gmail gives MondoFlyers its highest ranking for both domain and IP reputation: