The email your app has to send — password resets, receipts, alerts — delivered with great DX, a real deliverability suite, and white-label multi-tenancy. Self-hosted on independent infrastructure. No third-party black box.
# Already on Resend? Change one base URL — your code keeps working. curl https://api.usermails.com/emails \ -H "Authorization: Bearer um_live_••••" \ -d from="you@yourapp.com" \ -d to="user@example.com" \ -d subject="Welcome aboard" \ -d html="<strong>You're in.</strong>"
The DX of the modern players, the deliverability of the premium ones, and the control of running it yourself.
Accepts the same payloads as the Resend SDK. Migrate by changing a base URL — no rewrite, no lock-in.
Guided SPF/DKIM/DMARC, dedicated IP pools with automated warmup, suppression, and inbox-placement you can actually see.
Orgs → projects → keys from the schema up. Agencies and platforms resell email under their own brand and domain.
HMAC-signed delivery, bounce, complaint, open and click events — with retries and one-click replay.
Searchable message logs with a full per-message event timeline. Know exactly why an email did — or didn't — land.
Runs on independent, self-hosted sending infrastructure with dedicated IPs. No reliance on a shared third-party provider.
Authenticated-domain sends should reach the inbox — and you should be able to prove it. usermails ships dedicated IP pools, automated warmup, complaint-rate guards, and inbox-placement testing so reputation is something you manage, not pray about.
domain acme.com verified ✓ SPF aligned ✓ DKIM 3 keys ✓ DMARC p=quarantine ✓ IP pool dedicated · warmed ✓ inbox placement 97%
A genuinely useful free tier, transparent overage, and white-label margin for resellers. No surprise bills.
Create a key, point the SDK at usermails, send. Watch it land in your logs.