The deepest deliverability stack
in the category.
We don't just send mail. We instrument every hop, every handoff, every header — so when something goes wrong, you have the data to fix it.
Per-IP reputation tracked across 7 sources.
Talos, SenderScore, Postmaster Tools, plus 4 ISP feedback loops. Surface a downward trend before deliverability tanks.
- 7 reputation sources sampled hourly
- 15+ DNSBL real-time monitoring
- ISP-specific deferral pattern detection
Aggregate reports, parsed and humanized.
ISPs send DMARC aggregate reports as compressed XML. We ingest, parse, and surface them — with source breakdown, alignment failures, and policy advice.
- Reporter-by-reporter pass/fail rates
- Source IP breakdown with reverse-DNS
- Suggested policy upgrades (none → quarantine → reject)
RFC 3463 + heuristic classification.
Hard bounces, soft bounces, and the gray zone in between. We classify every DSN against RFC 3463 enhanced status codes plus 200+ ISP-specific heuristics.
- Per-recipient bounce history with full DSN
- Auto-suppression on hard bounces
- Per-ISP soft-bounce retry curves
Catch bad addresses before they bounce.
Validate addresses on the way in — syntax, domain, MX, and mailbox checks — so you protect your sender reputation instead of repairing it after the fact.
- Real-time validation on signup forms and via API
- Syntax, domain, and MX verification
- Mailbox checks to weed out dead and risky addresses
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