Inbox Placement Rate Calculator

What Affects Inbox Placement

Inbox placement is determined by a combination of infrastructure and behavioral signals:

• Complaint rate is the single highest-weight factor — Gmail threshold is 0.08%
• Authentication (SPF+DKIM+DMARC) is table stakes — missing any reduces placement
• Engagement signals — open rates, replies, and saves tell Gmail your mail is wanted
• IP age and history — new IPs are inherently untrusted until volume builds reputation

Related Calculators

• Email ROI Calculator
• IP Warm-Up Schedule
• SMTP Throughput Calculator
• Complaint Rate Threshold
• Delivery Rate Calculator