Send one email, get a /10 spam score.
Mail-Tester checks your email. MailKite aligns SPF/DKIM/DMARC for your domain and shows live status.
A minimal, copy-paste starter. Swap in your own domain and API key.
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 Mail-Tester",
html: "<p>Sent in milliseconds via MailKite.</p>",
});Mail-Tester is a free web tool: send one email to a unique test address and get a /10 spam score with SPF/DKIM/DMARC checks and SpamAssassin-based analysis. The quick reference for 'will this email be flagged as spam?'
Free (limited/day) + paid
Deliverability & DNS
SPF/DKIM/DMARC tools, inbox testing, and monitoring.
Point a domain, drop in a webhook URL, and send your first email in minutes. Unlimited domains, no credit card.
