SMTP.com

Premium SMTP relay + Email API (20+ years).

Visit SMTP.com Start free with MailKite

How MailKite fits

SMTP.com is premium relay. MailKite offers SMTP relay + full send/receive API + inbound JSON on one quota.

Send email from SMTP.com with MailKite

A minimal, copy-paste starter. Swap in your own domain and API key.

send.ts

import { MailKiteClient } from "@mailkite/client";

// One API, your own DKIM-signed domain — no mail server to run
const mailkite = new MailKiteClient({ token: process.env.MK_API_KEY! });

await mailkite.send({
  from: "you@yourdomain.com",        // any address on a verified domain
  to: "user@example.com",
  subject: "Hello from SMTP.com",
  html: "<p>Sent in milliseconds via MailKite.</p>",
});

Read the sending quickstart

SMTP.com (Ziff Davis) is a long-running premium SMTP relay and Email API with dedicated IPs, a Reputation Defender add-on, and managed onboarding. It leans enterprise and high-volume.