One platform for every email you send
From a password reset to a million-recipient campaign — Relayly handles sending, validation, and deliverability in a single, developer-friendly platform.
Fast, reliable email delivery
Idempotent, low-latency sending with the tooling production apps need.
Transactional API
Single-call sends with templating, merge fields, open/click tracking, and idempotency keys for safe retries.
Marketing campaigns
Lists, segments, sequences, and A/B testing with automatic one-click unsubscribe.
SMTP relay
A drop-in authenticated SMTP endpoint for apps and platforms that speak SMTP.
Protect your sender reputation
Clean lists and authenticated domains keep you out of the spam folder.
Real-time validation
Syntax, MX, disposable, role, catch-all and SMTP verification — by API or bulk upload.
Domain authentication
Guided SPF, DKIM and DMARC with per-domain keys and one-click DNS verification.
Suppression management
Automatic bounce, complaint, and unsubscribe suppression that's CAN-SPAM ready.
Reach the inbox at any scale
Automation that does the deliverability heavy-lifting for you.
Automated IP warmup
Volume-gated warmup that ramps dedicated IPs on real, engaged sending.
Reputation monitoring
Live blacklist checks, reputation scoring, and automatic throttling of at-risk IPs.
Analytics & logs
Per-message event logs, provider breakdowns, and dashboards for every metric.
See exactly how Relayly works
Descriptive, real flows — not marketing fluff. Here's what happens on every send, every validation, and every event we stream back.
Transactional send pipeline
From your API call to the recipient’s mail server — signed, warmed, and tracked.
One API call with your payload — idempotent and retry-safe.
Message assembled and cryptographically signed for your domain.
Routed through a warmed IP matched to your reputation.
Handed to the recipient's mail server with a VERP return-path.
Signed webhook delivery
Events are HMAC-signed so your endpoint can trust every payload — with automatic retries.
Delivered, opened, clicked, bounced — streamed as they happen.
Each payload is signed with your webhook secret.
Sent to your endpoint with the signature header.
Recompute, compare, trust — failed posts retry with backoff.
See it in your stack
Free tier, instant API keys, and SDKs for Python and Node.
No credit card required.