Five Gates Between Your Email and the Spam Folder
Intelligent warmup, safety gates, and real-time reputation monitoring ensure every email lands in the inbox.
Safety Gates
Policy Gate
Every email must pass the send policy before it enters the outbox. Rate limits, cool-down periods, and org-level rules are enforced here.
Quality Gate
Emails are scored across 5 dimensions. Any draft below the quality threshold is blocked and requeued for rewriting.
Compliance Gate
CAN-SPAM, unsubscribe headers, opt-out checks, and suppression list matching happen before the email reaches the provider.
Reputation Gate
Sender reputation is monitored in real time. If bounce rates or spam complaints spike, sending is automatically throttled.
Canary Gate
New templates and campaigns start with a small canary cohort. Only after positive signals does the system scale to full volume.
Warmup Timeline
Week 1-2
50/day
Initial warmup
Week 3-4
200/day
Building reputation
Week 5-8
800/day
Scaling volume
Week 9+
2000/day
Full capacity
Infrastructure
Outbox Pattern
No email is ever sent directly. Every message goes through an outbox queue with idempotency keys, ensuring no duplicates even under retry conditions.
Domain Rotation
Sending is distributed across multiple domains and IPs. If one domain's reputation dips, traffic is automatically rerouted.
Bounce Classification
Hard bounces trigger immediate suppression. Soft bounces are retried with exponential backoff. Patterns are analyzed to detect list quality issues.
Real-Time Monitoring
Inbox placement, spam folder rates, and engagement metrics are tracked per domain, per campaign, and per sender in real time.