< 1s average delivery time. 99.9% uptime. Zero shared-IP surprises.
No credit card required · Free up to 1,000 emails / month
curl -X POST https://api.webmail.io/v1/send \
-H "Authorization: Bearer <api_key>" \
-H "Content-Type: application/json" \
-d '{
"to": "user@example.com",
"from": "you@yourdomain.com",
"subject": "Welcome",
"html_body": "<h1>Hello!</h1>"
}'{
"message_id": "550e8400-e29b-41d4-a716",
"status": "queued",
"submitted_at": "2025-06-06T10:30:00Z"
}99.97%
Delivery rate
< 800ms
Avg. delivery time
0.001%
Spam complaint rate
From API to inbox — one platform, zero shared-IP surprises.
| Reason | Date | |
|---|---|---|
| alice@example.com | Hard Bounce | Jun 6, 2025 |
| bob@corp.io | Unsubscribe | Jun 5, 2025 |
| spam@test.net | Complaint | Jun 4, 2025 |
Hard bounces and complaints are suppressed instantly and permanently.
List-Unsubscribe headers are injected automatically
on every send — keeping you out of the spam folder.
Every open, click, bounce, and complaint fires a webhook within seconds. HMAC-signed payloads with 10-attempt exponential back-off ensure nothing is missed.
Message timeline
Queued
Jun 6, 10:30:00 AM
Sent
Jun 6, 10:30:01 AM
Delivered
Jun 6, 10:30:02 AM · via SES relay
Opened
Jun 6, 10:30:03 AM · Chrome / macOS
No DevOps experience needed. Integration takes minutes, not days.
Sign up free — no credit card needed. Your first 1,000 emails every month are on us.
Add DNS records for SPF, DKIM, and DMARC. Our wizard walks you through it in minutes.
One POST request — or swap your SMTP credentials. Start tracking opens and clicks immediately.
Don't take our word for it.
"We migrated from SendGrid and our delivery rate jumped 4 points in the first week. The separated streams feature alone was worth the switch."
Jamie Kim
Senior Engineer, Acme Corp
"The API was up in 10 minutes, webhooks in 20. I've never integrated an email provider this fast. The docs are genuinely excellent."
Sofia Reyes
CTO, NovaTech
"Real-time open and click analytics surfaced an A/B winner we'd been guessing at for months. The ROI on WebMail paid for itself in two campaigns."
Marcus Lee
Head of Growth, DataFlow
"We send 2 million transactional emails a month. Switching to WebMail cut our infrastructure costs by 40% while actually improving inbox placement."
Priya Anand
VP Engineering, ScaleUp
"The webhook reliability is night and day versus our old provider. Zero missed events in six months — our support team finally stopped chasing lost emails."
Tom O'Brien
Lead Developer, FinTrack
One POST request is all it takes. Pick your language and copy-paste a working example straight into your codebase.
message_id
Join thousands of developers who send millions of emails through WebMail every month.
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