S2G

SMTP2GO

Reliable global SMTP relay with a focus on deliverability.

How MailKite fits

Need SMTP relay? MailKite's SMTP endpoint (smtp.mailkite.dev) uses your API key as the password — one quota for SMTP, API, and inbound.

Send email from SMTP2GO 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 SMTP2GO",
  html: "<p>Sent in milliseconds via MailKite.</p>",
});

Read the sending quickstart

SMTP2GO is a global SMTP relay service focused on reliable transactional and marketing delivery. It's SMTP-first with a straightforward API and good reporting, aimed at teams that want send-only relay without running their own mail server.