MailTs

Native TypeScript SMTP & IMAP mail SDK with Google & Microsoft OAuth, Gmail & Graph APIs and durable queues — zero runtime dependencies, stable 1.0 API. A modern nodemailer alternative.

npm install @mailts/core

Teach your AI coding agent mailts: npx @mailts/cli skill install

What MailTs gives you

Native SMTP — STARTTLS required before login, PLAIN/LOGIN/XOAUTH2, PIPELINING, SMTPUTF8, connection pool, DKIM signing.
Native IMAP — byte-exact parser, full MIME, search, MOVE/COPY/APPEND, CONDSTORE, watch() by UID and a per-account connection pool.
OAuth 2.0 — Google and Microsoft sign-in for CLIs and web apps, token refresh with rotation, service accounts and app-only access.
Providers — Resend, SendGrid, Mailgun, Postmark, Amazon SES, Gmail API and Microsoft Graph, plus one Mailbox API across IMAP, Gmail and Graph.
Queue + DLQ — priorities, retries, scheduled sends, rate limits, idempotency keys, crash-safe SQLite and MailWorker for Redis or Postgres.
Smart inbox content — schema.org cards, AMP for Email, Outlook Adaptive Cards; iCal invites, replies and one-click unsubscribe.

Documentation

This documentation site is interactive and requires JavaScript. Plain-text versions for machines: /llms.txt (index) and /llms-full.txt (full reference).