Inbox Placement

Inbox placement is the percentage of your delivered email that reaches the recipient primary inbox, as opposed to the spam folder, the junk folder, or a tab like Promotions where it is rarely opened. It is the metric that matters most in cold outbound, because a message in the spam folder is delivered but effectively invisible.

Why it matters for outbound

Delivery rate alone is misleading. A sender can report 99% delivery while most of that mail sits in spam, never to be read. Inbox placement cuts through that illusion by asking the only question that drives pipeline: did a human actually see it? A few points of placement, multiplied across thousands of sends, is the difference between a program that books meetings and one that quietly fails.

Outword treats inbox placement as the true north of any sending program, because reply rate and meeting rate are downstream of it.

How it works

Placement is decided by the receiving mailbox provider using the same reputation and authentication signals that govern overall deliverability, then a final filtering step that sorts the message into a folder.

• Strong sender reputation and clean authentication move mail toward the inbox.
• High engagement (opens, replies) reinforces inbox placement over time.
• Spam complaints, spam trap hits, and high bounces push mail to the spam folder.

Because placement is invisible from the sending side, it is monitored with seed testing and engagement signals. Our deliverability and inbox placement service exists to keep this number high.