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Email Marketing Glossary.

Clear, no-fluff definitions of every email marketing term that matters—from open rates to double opt-in. 

 

Inbox Placement

Inbox placement is the percentage of your delivered emails that actually land in the primary inbox rather than the spam or promotions folder. It's the truest measure of whether you're reaching people.

Also known as: inbox placement rate, IPR

"Delivered" and "in the inbox" aren't the same thing. Inbox placement measures the outcome that actually matters: whether your subscribers can see your email without digging through spam.

How is inbox placement different from delivery?

Delivery just means the receiving server accepted the message. Inbox placement distinguishes primary-inbox arrival from spam and promotions folders — a gap standard metrics miss.

How do you measure inbox placement?

Because email platforms can't see inside recipients' folders, inbox placement is measured with seed lists — test addresses across major providers that reveal where your mail lands.

How do you improve inbox placement?

Authenticate your domain, maintain a strong sender reputation, keep your list clean and engaged, and keep complaints low. It's the same foundation that drives deliverability overall.

Related terms

Email Deliverability Sender Reputation SPF DKIM DMARC Hard Bounce

Related reading from Drip

Ecommerce Email Deliverability: 9 Ways to Reach the Inbox What's a Good Email Deliverability Rate in 2026?

Frequently asked questions

What is inbox placement?
Inbox placement is the percentage of delivered emails that land in the primary inbox rather than the spam or promotions folder. It's a more accurate measure of reach than a simple delivery rate.
How is inbox placement different from delivery rate?
Delivery rate counts every message the receiving server accepted, including those sent to spam. Inbox placement counts only emails that reach the primary inbox, so it reveals the gap standard delivery metrics hide.
How do I measure inbox placement?
Use seed-list or inbox-placement testing tools, which send to test addresses across major mailbox providers and report where your mail lands. Your email platform's 'delivered' metric can't see inside recipients' folders.
How can I improve inbox placement?
Authenticate with SPF, DKIM, and DMARC; keep a strong sender reputation; mail only engaged, opted-in subscribers; clean your list regularly; and keep spam complaints low.
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