Emails never get lost in space.

Milesender is the email API and SMTP layer that gets every send, reply, and bounce exactly where it's supposed to go — however far it has to travel.

Start in sandbox Read docs

Delivers cleanly to every major inbox

GmailOutlookYahoo MailApple MailiCloud MailProtonMailFastmailZoho MailGmailOutlookYahoo MailApple MailiCloud MailProtonMailFastmailZoho Mail

Well, 60 seconds is all it takes to set up. Cool, right?

Test immediately with a sandbox sender — no DNS wrangling required until you actually want to go live.

Instant test mode

<60s

Send before DNS is ready.

Every project starts with a test API key, sandbox sender, and a send-test button.

Create projectSandbox readyVerify domainGo live

openbook

Sandbox ready

Email setup

A cleaner way to connect product email.

Start in sandbox, add a domain when you are ready, and keep the integration surface simple.

Done

Create project

Ready

Send test email

Verify domain

npm install @milesender/nodecopy

What it does

One email layer for modern apps.

Keep the homepage simple. The deeper mechanics belong in docs, onboarding, and the dashboard.

Send

Transactional email through API or SMTP.

Receive

Route replies and inbound messages back to your app.

send-account-ready.ts

import { Milesender } from "@milesender/node";

const milesender = new Milesender(process.env.MILESENDER_API_KEY);

await milesender.emails.send({
  from: "OpenBook <support@openbook.com>",
  to: "user@gmail.com",
  subject: "Account ready",
  html: "<p>Your account is ready.</p>",
});

Send

API for modern apps. SMTP for everything else.

Use the clean Email API for product code and scoped SMTP credentials for Laravel, WordPress, internal tools, or any system that already speaks SMTP.

ms_test_xxxxx for sandbox

ms_live_xxxxx for verified domains

ms_smtp_xxxxx for STARTTLS

Receive email, parse it, and route it back to your app.

Inbound turns support addresses and replies into structured messages, thread events, webhooks, and embeddable inbox views.

support@customerdomain.com

Milesender parser

Webhook to app

Verify

Improve inbox placement with honest controls.

Milesender helps teams improve inbox placement with verified domains, clean authentication, rate limits, suppression handling, and delivery monitoring.

Read deliverability docs

DNS verified

3/4

DMARC pending

Bounce rate

0.7%

below limit

Suppression

protected sends

Observe

Every email gets a readable timeline.

Show exactly what happened: accepted by API, queued, signed, sent, delivered, bounced, complained, retried, or routed inbound.

Recent activity

welcome@openbook.comDelivered

reply@support.openbook.comInbound

receipt@billing.openbook.comDelivered

Delivery trace

Delivered

16:00:00

Queued

Accepted by the API

16:00:01

Signed

DKIM selector ms1

16:00:02

Sent

Sent to the recipient's mail server

16:00:04

Delivered

250 2.0.0 OK queued as A91BC

“I'm glad I onboarded my website to Milesender. It was fast and easy to set up, I haven't had any issues with emails bouncing, and it's affordable and reliable.”

MichaelMilesender customer

“Milesender is really good and affordable for mid-sized users like us. It's efficient, and the customer support is fast.”

AmakaMilesender customer

“I enjoy using Milesender. I've onboarded six websites, and it's been really great.”

TonyMilesender customer

“Milesender made email setup feel like a product feature instead of a week of infrastructure work.”

AmaraEngineering Lead

“The embedded domain setup is the piece we always wanted to build and never had time for.”

NoahSaaS founder

“Our support team can finally see the timeline behind every customer email.”

IfePlatform

“Sandbox first, DNS when ready, production after verification. That flow is honest and fast.”

MilanBackend

Start with a clean sandbox.

Create a project, send a test email, and move the deeper setup into the dashboard when it matters.

Start in sandbox

import { Milesender } from "@milesender/node"; const milesender = new Milesender(process.env.MILESENDER_API_KEY); await milesender.emails.send({ from: "OpenBook <support@openbook.com>", to: "user@gmail.com", subject: "Account ready", html: "<p>Your account is ready.</p>", });