OutboundOS – self-hosted outbound email on the buyer’s SMTP

OutboundOS is a Next.js outbound workspace: find or import a list, clean it, write a sequence, send from the customer’s own SMTP, and handle the reply. Campaigns never leave from a shared warmup pool or the vendor domain.

Launch stays locked until DNS passes, list bounce risk is under 3%, and every step carries {{unsubscribe_url}}. Bounce above 3% pauses the inbox. A reply cancels remaining sends. Analytics count replies and bounces — there is no open pixel.

Who it is for

Agencies and founders who already own a domain and inbox
Teams who want Instantly-style sending without a shared IP pool
Operators who want to run it self-hosted (/install) or as multi-tenant SaaS (HOSTED=true)

What you get

ICP — write the buyer down before the list exists
Inboxes — customer SMTP + IMAP, ramp, send window, daily cap, DNS health
Lists — CSV import (Apollo, Clay, Instantly, HubSpot, ZoomInfo, Sheets), edit/delete leads, suppression that survives re-import
Find leads — Hunter first, Prospeo fills misses (BYO keys); optional Apollo fetch with the buyer’s key
Verify — MX + syntax; MillionVerifier for “inbox exists” when a key is set
Sequences — wait steps, A/B subjects, required unsubscribe token
Campaigns — launch lock that says exactly what is blocking
Inbox — stop-on-reply, OOO re-queue, interested → pipeline
Pipeline — Meeting / Won / Lost
Analytics — reply, positive reply, bounce. No opens.
Operator — workspaces, plans, hosted mode, Super Admin

Hard gates (not settings)

Bounce pause at 3%
Sends after a reply: 0
New inbox ramp starts at 40/day
Postal address required for compliance copy

Two deploy modes

Self-hosted — first visit is /install. Local Mailpit for test sends.
Hosted SaaS — set HOSTED=true. Signup instead of install. Shared workers, isolated workspace data, still their SMTP only.

Live demo

https://webbuddy-outbound.fly.dev

Create a workspace from /signup. Optional API keys (Hunter, Prospeo, Apollo, MillionVerifier, OpenAI) are entered in Settings — they are not bundled.

Stack

Next.js 16, React 19, TypeScript
Postgres 16 + Drizzle
Redis 7 + BullMQ worker (npm run worker must stay up)
Nodemailer + IMAPFlow

Requirements

Node.js 20+
Postgres 16
Redis 7
SMTP + IMAP on the sending domain (or Mailpit for local)
VPS / Fly / Railway / Docker — not Vercel alone (the worker is a long process)

Quick start

cp .env.example .env
npm install
npm run infra
npm run db:push
npm run dev
npm run worker

Open http://localhost:3000. First visit goes to /install. Mailpit UI: http://localhost:8025.

Full stack: docker compose --profile full up --build

What is not included / not this product

No shared warmup pool, no sending from the vendor domain
No open tracking pixel
No owned people database, LinkedIn scrape, or dialer
Hunter / Prospeo / Apollo / verifier / AI keys are the buyer’s (usage billed by those providers)

Credits

Next.js, React, Drizzle, BullMQ, Tailwind CSS v4, Geist and Source Serif 4 (Google Fonts), Nodemailer, IMAPFlow. Optional: Hunter, Prospeo, Apollo, MillionVerifier, Resend, Stripe.

Changelog

v1.0.0 — Initial CodeCanyon release. Find (Hunter/Prospeo), Apollo fetch, lead edit/delete, MillionVerifier, hosted + install modes, web + worker.

OutboundOS – Ai Powered Self-Hosted Outbound Email