Inbox Placement Rate
The percentage of emails that make it past the spam, promotions or other folders, and successfully land in the primary inbox, making it more likely for recipients to see them and engage with the content, resulting in higher open rates, click-through rates, and conversions.
It is calculated by dividing the number of emails that successfully land in the primary inbox by the total number of emails that were delivered (not just sent). While Accepted Rate tells you emails get in, Inbox Placement Rate measures whether emails actually made it to the inbox, the destination that matters.