Sender Reputation Score Calculator

Score your sender reputation across the key signals that ISPs use to make inbox/spam decisions.

Sender ScoreSender ReputationInbox PlacementISP FiltersDeliverability

Sender Reputation Score Calculator

Estimate your sender reputation across the signals that major ISPs weigh when making delivery decisions.

Complaint Rate (%)

Hard Bounce Rate (%)

Average Open Rate (%)

Click Rate (%)

IP Age (months)

On Spamhaus/Major Blacklist?

Authentication (SPF+DKIM+DMARC)

Sending Consistency

How ISPs Score Senders

ISP reputation systems are proprietary, but publicly known signals include:

Complaint rates — highest weight signal, especially at Gmail
Engagement signals — opens, clicks, and replies signal desired mail
Infrastructure signals — IP age, PTR record, volume consistency
Authentication — SPF+DKIM+DMARC alignment with p=reject
Blacklist presence — any listing on ZEN or SBL causes immediate filtering

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