Transactional email
that isolates your customers.
Every customer gets their own sender reputation and their own suppression list. One tenant’s hard bounce never touches another’s deliverability — which is not true of most email APIs you can buy today.
curl https://api.sreemail.com/v1/emails \
-H "Authorization: Bearer $SREEMAIL_KEY" \
-H "Idempotency-Key: order-1234" \
-d '{
"from": "hello@yourdomain.com",
"to": "user@example.com",
"subject": "Your order shipped",
"html": "<p>On its way.</p>"
}'
# → 202 { "id": "msg_use1_01JQ…", "status": "queued" }Why it’s different
Multi-tenant from the database up
Most email APIs treat your customers as one undifferentiated stream of mail. When one of them mails a stale list, everybody’s delivery rate drops and nobody can tell why.
Per-tenant suppression
Bounces and complaints are scoped to the customer that caused them. An address one tenant burned stays deliverable for everyone else.
Per-tenant reputation
Each customer sends under an isolated identity with its own bounce and complaint metrics, so you can see exactly who is causing a problem.
Automatic containment
A tenant whose bounce rate spikes is paused automatically, before it damages the shared IP pool everyone else is sending on.
Bring your own domain
DKIM, a custom MAIL FROM so SPF actually aligns, and DMARC guidance. Every record is checked live so you can see which one is wrong.
Idempotent by default
Send an Idempotency-Key and a retried request replays the original response instead of mailing your customer twice.
Events you can replay
Signed webhooks with a retry ladder out to 24 hours, and a replay endpoint for when your handler was down and you need the mail back.
Built honestly
What this is today
The sending API is implemented and tested end to end. We would rather tell you exactly what works than sell you a roadmap.
Shipped
Sending, batching, scheduling, templates, domain verification, webhooks with replay, suppression, and daily and monthly limits.
In progress
Dashboard polish, per-organization test sending addresses, and richer delivery analytics.
Not started
Dedicated IP pools, open and click tracking on a custom domain, and team invites.
Send your first email today
Free to start, no card required. Verify a domain and you’re sending in minutes.
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