Sender reputation vs IP reputation: differences and when to use each

Domain reputation follows your brand across any infrastructure; IP reputation is tied to infrastructure and is shared on shared pools.

What sender reputation is#

Sender reputation is the score mailbox providers assign to a sending domain and IP based on complaint rates, bounce rates, engagement, spam-trap hits, and authentication history. It determines whether mail is delivered, filtered, or rejected.

Why it matters#

Reputation is the dominant factor in inbox placement. Content matters far less than the trust a provider has in your domain.

How IP reputation differs#

IP reputation solves an adjacent problem. Domain reputation follows your brand across any infrastructure; IP reputation is tied to infrastructure and is shared on shared pools. In practice the two are deployed together and monitored with the same reporting.

Which to implement first#

Start with whichever your sending platform makes easiest, then add the other. Deployment order matters less than reaching a state where both pass and align with your From domain.

Frequently asked questions#