Superkabe Documentation
Technical guides for the AI cold email platform with native deliverability protection.
What is Superkabe?
Superkabe is an AI-powered cold email platform with native deliverability protection. Draft AI sequences, send across unlimited mailboxes (Gmail, Microsoft 365, or SMTP), validate every email, route leads by ESP — and let the protection layer auto-pause, reroute, and heal senders in real time.
Every lead that enters Superkabe passes through a multi-stage pipeline before reaching your sender:
Syntax, MX records, disposable domains, catch-all detection + MillionVerifier API for risky leads. Invalid emails are blocked before they reach your sender.
Every lead is classified by risk. GREEN routes normally, YELLOW distributes with per-mailbox caps, RED is blocked entirely.
Each send is routed to the mailbox most likely to land in inbox for that recipient's ESP — Gmail, Outlook, Mimecast, or generic SMTP.
Checks mailbox health every 60 seconds. Bounce rates, SMTP/IMAP connectivity, DNS authentication (SPF, DKIM, DMARC).
Auto-pauses on threshold breach (3% bounce rate at 60+ sends, with a 5-bounce safety net). The correlation engine determines if the root cause is the mailbox, domain, or campaign.
Pause → Quarantine (DNS check) → Restricted Send → Warm Recovery → Healthy. Fully automated with per-phase graduation criteria.
AI-driven Claude / MCP integration, mailbox rotation, ESP-aware load balancing, Slack alerts, reports, and CSV export are included across all plans.
Getting Started
Quick Start
Set up your account, connect platforms, and start protecting infrastructure
Onboarding & Account Setup
Sign-up paths (email/password vs Google OAuth), trial mechanics, first-time setup checklist
Integrations
Claude (MCP Server)
Connect Claude.ai (browser, OAuth) or Claude Desktop / Code / Cursor (stdio). 17 tools, full security model
Slack
Real-time deliverability alerts delivered to your Slack workspace
Clay
Webhook ingestion for enriched leads with automatic validation and routing
Webhooks
Outbound POST callbacks for sending and protection events. HMAC-signed, retried, replayable
Migrate from Smartlead
One-time import of campaigns, sequences, leads, and mailbox metadata
Migrate from Instantly
Import from Instantly v2 — campaigns, leads, block list, mailboxes
Core Concepts
Sequencer Overview
The sending half end-to-end — campaigns, sequences, variants, dispatcher, and the protection-layer handoff
Platform Rules
System modes (observe/suggest/enforce), thresholds, and enforcement mechanisms
State Machine
Entity lifecycle states and valid transitions for mailboxes, domains, and leads
Email Validation
Validation pipeline, status meanings, credit consumption rules per tier
ESP-Aware Routing
60% capacity / 40% per-ESP performance — how each send picks the optimal mailbox
Execution Gate
GREEN/YELLOW/RED lead classification and pre-send validation
Risk Scoring
Bounce rate, engagement, and infrastructure signals combined into risk scores
Monitoring System
60-second health checks, tiered thresholds, sliding windows, and auto-pause logic
Warmup & Recovery
5-phase healing pipeline and automated mailbox rehabilitation
API Reference
REST API v1
Full endpoint reference for leads, campaigns, validation, replies, and account
API Integration Guide
Authentication, rate limits, error model, and idiomatic usage patterns
Operations
Configuration
Threshold tuning, system modes, and environment-level setup
Deployment
Production deployment steps and verification procedures
Infrastructure Assessment
Automated health check on onboarding — DNS, bounce rate, connection validation
Technical Architecture
System design, data flow, and infrastructure overview
Disconnecting Integrations
Revoke API keys, OAuth grants, mailboxes, webhooks. GDPR account deletion
Changelog
Help Center
Email Validation
How the hybrid validation layer works — internal checks + MillionVerifier API
Auto-Healing Pipeline
5-phase recovery: pause → quarantine → restricted → warm → healthy
Why Is My Mailbox In Quarantine?
DNS health check phase — what keeps you stuck and how to fix it
Mailbox Rotation
Automatic standby mailbox swapping when a sender is paused
Status Labels Explained
Every status across mailboxes, domains, campaigns, and leads
Bounce Classification
Hard, soft, and transient bounces — what each means for your reputation
Load Balancing
Effective load calculation and mailbox distribution
Optimization Suggestions
What/Why/How recommendations for rebalancing infrastructure
Why Is My Campaign Paused?
Auto-pause when all mailboxes are unhealthy — how to resume
Connection Errors
Troubleshoot SMTP/IMAP failures, OAuth expiry, and disconnects
Infrastructure Score
How the composite health score is calculated from DNS, bounces, and engagement
24/7 Monitoring
Automated background syncing and continuous health checks
Notifications
Alert types, severity levels, and configuration
Audit Logs
Full action history — pauses, resumes, rotations, and automated decisions
Analytics
Open rate, click rate, reply rate, bounce rate trends
Billing
Manage your plan, billing, and subscription
Account Management
Account settings, team, and organization
Core Principles
1. Protection Over Volume
We prioritize infrastructure safety over send volume. A burned domain costs more than missed opportunities.
2. Tiered Escalation
3% bounce rate at 60+ sends triggers a pause; a 5-bounce safety net catches low-volume mailboxes early. Operators get warned before hard stops.
3. Ratio-Based Scaling
Domain health uses percentages (30% warning, 50% pause) to scale with infrastructure size.
4. Signal Separation
Hard signals (bounces) trigger blocks. Soft signals (velocity) only log. Clean mailboxes stay active.