Get instant notification of failed emails from your transactional email providers
Open-source email infrastructure with automated deliverability
Stage
Not given
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Founded
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Based in
AT
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Pricing model
Paid
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Pricing
One-time payment: 99€
Free plan: 3,000 emails/month with 100/day limit. Pro: $10/month for 50,000 emails/month with no daily limit. Growth: $20/month for 100,000 emails/month with no daily limit. Enterprise: custom pricing. Overage emails on paid plans: $0.50 per 1,000. Pay-as-you-go Credits: $5 per 10,000 emails ($0.50
Key features
Instant notifications for email failures
Support for Mailgun, SendGrid, Mailjet, Brevo, Resend and Postmark
No-code setup in one minute
Track multiple email event types
Connect unlimited providers
Unlimited email event tracking
Multiple provider support simultaneously
Webhook-based architecture
Disposable email detection against ~210,000-provider catalogue
Role address detection and MX record lookup
Automated IP warmup with volume ramps
Email templates and editor
AI agent integration via MCP server
SMTP relay with custom domains
Email validation and list cleaning
Delivery analytics and open/click tracking
Spam testing and reputation monitoring
Developer CLI for terminal access
What makes it different
One-time payment model with unlimited lifetime use
No API tokens or credentials required
Real-time webhook notifications from email providers
No API key required for free temp email checker, rate-limited per IP
Open source under Apache 2.0 with same code for self-hosted and cloud
AI-native with MCP integration for Claude, Cursor and other agents
Reloop