Spam Complaint Rate
The share of recipients clicking 'report spam.' Gmail's bulk-sender threshold: stay under 0.3%, ideally under 0.1%.
Free · no signup · last reviewed August 29, 2026
The definition
The share of recipients clicking 'report spam.' Gmail's bulk-sender threshold: stay under 0.3%, ideally under 0.1%.
Why it matters to an owner
The metric with a cliff: cross the threshold and Gmail throttles everything you send, good emails included. Complaints mostly mean you emailed people who forgot they knew you.
Keep going
Sender ReputationThe trust score inbox providers assign your sending domain and IP, built from complaint ra…DeliverabilityWhether your email actually reaches inboxes rather than spam folders or silent rejection. …List HygieneThe practice of keeping an email list clean: removing bounces, validating addresses, sunse…
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