Reputation

How mailbox providers judge senders from IP, domain, and behavioral signals over time.

Reading time:: 5 min
Difficulty:: Beginner
Estimated duration:: 5 min
Prerequisites:: None
Last updated:: 2026-07-15
Author:: empire

Definition

Reputation is the accumulated trust mailbox providers assign to sending IPs and domains based on authentication, complaints, bounces, traps, and engagement.

IP reputationProvider trust in a sending IP address based on historical traffic quality and outcomes.
Domain reputationProvider trust in a sending domain identity, often stronger than IP reputation alone.
Dedicated IPA sending IP used exclusively by one sender, isolating reputation from neighbors.
Shared IPA sending IP shared by multiple senders, where neighbor behavior can affect reputation.
Complaint rateShare of delivered mail that recipients mark as spam or report as abuse.
Bounce rateShare of attempted deliveries that fail permanently or repeatedly, harming sender trust.
Spam trapsAddresses maintained to detect poor acquisition or stale lists; hits damage reputation quickly.
Engagement signalsPositive and negative recipient actions (opens, clicks, deletes, ignores) that influence filtering.
Sending historyAccumulated volume, consistency, and outcome patterns that form a sender's reputation baseline.
Reputation recoveryControlled remediation after damage: stop the cause, clean lists, rebuild volume carefully.
Reputation monitoringOngoing observation of FBLs, bounce classes, provider dashboards, and blocklist signals.
AuthenticationIdentity signals for email: SPF, DKIM, DMARC, and related controls.
DNSDomain Name System — the lookup fabric email authentication depends on.

Empire Services

Reputation auditAssess IP/domain reputation posture, metrics, monitoring gaps, and isolation strategy.

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WarmupControlled introduction of sending volume so mailbox providers learn to trust a domain or IP.

Reputation

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Where do you want to go next?

Reputation

Definition

▼Continue Learning

▼Related Problems

Empire Services

Where do you want to go next?