Your transactional
emails,
delivered.
< 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
Everything you need for great deliverability
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 |
List-Unsubscribe: <mailto:unsub@webmail.io?subject={{id}}>
Automatic suppression & compliance
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.
- ✓Auto-suppress on bounce or complaint
- ✓RFC 8058 one-click unsubscribe
- ✓GDPR data export on request
Real-time event tracking
Every open, click, bounce, and complaint fires a webhook within seconds. HMAC-signed payloads with 10-attempt exponential back-off ensure nothing is missed.
- ✓Sub-second webhook delivery
- ✓Open & click pixel tracking
- ✓Full event timeline per message
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
Up and sending in 3 steps
No DevOps experience needed. Integration takes minutes, not days.
Create an account
Sign up free — no credit card needed. Your first 1,000 emails every month are on us.
Verify your domain
Add DNS records for SPF, DKIM, and DMARC. Our wizard walks you through it in minutes.
Send via API or SMTP
One POST request — or swap your SMTP credentials. Start tracking opens and clicks immediately.
Loved by developers
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
Integrate in minutes, not days
One POST request is all it takes. Pick your language and copy-paste a working example straight into your codebase.
- Bearer-token auth — one API key, all endpoints
-
202 Accepted response with
message_id - Full OpenAPI spec at /api/docs/
Ready to improve your deliverability?
Join thousands of developers who send millions of emails through WebMail every month.
No credit card required · Cancel anytime