A Resend-style email platform on your own Amazon SES that runs on Cloudflare Workers. Transactional email, newsletters, automations, receiving and deliverability, for as many businesses as you like.
The whole mailroom
Everything a business needs from email, in one dashboard that feels like a modern app, not a control panel.
Broadcast reports. Opens and clicks hour by hour after it went, the email apps it was read in, and a click map on the email itself.
Receipts, sign-in codes and alerts, through an API your code already knows.
Broadcasts and newsletters with the tools usually saved for expensive plans.
Mail coming in is first class too, threaded into conversations a team can answer.
The guardrails that keep your sending reputation, and your SES account, healthy.
Make it yours
Emails, newsletter pages, sign-up forms and the website chat are all designed in Mailroom, with a live preview on desktop, phone and dark mode.
Every broadcast and template, built from blocks or raw HTML.
A public archive, web versions and poll pages that share one look.
Drop one snippet on your site and design it from the dashboard.
A chat on your site, answered from the dashboard or straight from your email.
People get exactly the access they need, per organization.
How each organization and brand sends, receives and protects itself.
For developers
Mailroom answers Resend's API, so Resend's SDKs work by pointing their base URL at your deployment.
POST /api/emails, /batch, scheduling up to 30 days and Idempotency-Key.// npm install resend (RESEND_BASE_URL=https://<your url>/api)
import { Resend } from "resend";
const resend = new Resend(process.env.MAILROOM_API_KEY);
await resend.emails.send({
from: "Your app <hello@mail.example.com>",
to: ["ana@example.com"],
subject: "Your order has shipped",
html: "<p>It's on its way.</p>",
tags: [{ name: "kind", value: "order" }],
});curl https://<your url>/api/emails \
-H "Authorization: Bearer mr_..." \
-H "Content-Type: application/json" \
-d '{
"from": "hello@mail.example.com",
"to": "ana@example.com",
"subject": "Your order has shipped",
"text": "It is on its way."
}'export MAILROOM_API_KEY=mr_… MAILROOM_URL=https://mailroom.example.com
mailroom send --from hello@mail.example.com --to ana@example.com \
--template welcome --var name=Ana
mailroom emails --status bounced
mailroom tail # new emails and their events, live
mailroom import contacts.csv --segment <id>
mailroom check --subject "Your order has shipped" --html email.htmlAgent inboxes
An agent gets an address of its own and a credential that reaches only that inbox, through the REST API or MCP. It can draft, and a person approves.
Many businesses, one deployment
Each organization in Mailroom is its own SES tenant with its own configuration set, domains, keys and limits. One that should be fully apart can bring its own SES account.
What it costs
You run it on your own accounts: Cloudflare Workers Paid and Amazon SES. Nothing is charged per contact, per seat or per brand, so a growing list never moves the bill.
Emails a month
SES's list price for outgoing email. Attachments, receiving and dedicated IPs are billed by AWS as usual.
Deploy
The Deploy button copies the repo to your GitHub, creates the database, storage and bucket, and redeploys on every push. Mailroom sets up the rest of SES from its own pages.
Pick a region, request production access, and create an IAM user with the policy from the README.
Click Deploy to Cloudflare, or deploy from a terminal. Give it your address, admin email and AWS keys.
Set up events, create an organization, add a domain. Where your DNS host supports it, one click adds every record.
Send to SES's simulator addresses and watch delivered, bounced and complained arrive within seconds.
# or from a terminal (Node 20+ or Bun)
git clone https://github.com/RVP97/mailroom && cd mailroom
bun install
bunx wrangler d1 create mailroom # and its id in wrangler.jsonc
bunx wrangler kv namespace create OAUTH_KV
bunx wrangler r2 bucket create mailroom-inbound
bunx wrangler secret put BETTER_AUTH_SECRET # and the two AWS keys
bun run deploy # builds, migrates, deploys
Mailroom is free and open source under the MIT license. Run it, change it, and send as much as you like. Issues and pull requests are welcome.