MailroomSign in
Free, no extension, sends from your Gmail

Personal email to your
whole list, from your Gmail.

Mailroom is a free bulk Gmail sender with built-in mail merge. Upload a CSV, write one email with merge tags, and every recipient gets their own personalized copy — sent through your own Gmail account, not a third-party relay.

Get started with GoogleSee how it works
  • 300 a day free, no credit card
  • Sends from your own Gmail, not a shared relay
  • 300/day free · up to 2,000/day on Pro
  • 300/day free — not a 50/day teaser

For people who already hear from you. Mailroom is built for opted-in subscribers, customers, members and event attendees. It is not for cold outreach, and sending to purchased or scraped lists is not permitted.

Hi {{first_name}} —
delivered ✓

Built on the same Gmail your customers already trust

Gmail APIGoogle OAuth 2.0Next.js 16SupabaseVercelNo extension

From CSV to inbox in under five minutes.

The whole thing is one screen. Connect Gmail, drop a CSV, write your email. That's it.

01

Connect your Gmail

One-click Google sign-in. Mailroom uses official Gmail API access — no app passwords, no SMTP setup, no scraping. Works with any @gmail.com address or Google Workspace account.

02

Upload your CSV

Drag in any CSV with an email column. Every other column (first_name, company, deal_amount, whatever) becomes a merge tag you can drop into your email with {{ }}.

03

Write one email, send hundreds

Write your subject and body once. Use {{first_name}}, {{company}}, or any column from your CSV. Mailroom renders a personalized copy for each recipient and sends it from your Gmail.

04

Track opens, manage your list

Built-in 1×1 open-tracking pixel, one-click unsubscribe footer, and a per-user suppression list so unsubscribes are honoured on every future send. No CRM required.

Everything a paid bulk Gmail sender does — without the monthly fee.

Real mail merge

Use any CSV column as a merge tag — {{first_name}}, {{company}}, {{custom_anything}}. Fall back to defaults when fields are empty.

Sends from your Gmail

Authenticated through the official Gmail API. Your messages come from your own address with your own sender reputation, rather than being routed through a shared third-party relay.

Schedule sends

Pick a future date and time — Mailroom queues the send and dispatches via cron when the moment arrives, even if your laptop is closed.

Open tracking

Each email gets a unique 1×1 tracking pixel. See who opened, when, and how many times. Tokens are HMAC-signed so they can't be forged.

Suppression list

Anyone who unsubscribes is added to your suppression list and is skipped automatically on every future send, so you never have to clean the list by hand.

One-click unsubscribe

Every email includes a signed unsubscribe link. Recipients are added to your per-user suppression list and skipped on future sends.

Test send before launch

Send a test copy to yourself first — see exactly how the merge tags render before your list receives it.

Templates

Save your best emails as reusable templates. Spin up a new project from a template in two clicks.

Daily-cap aware

Gmail caps sends at 500/day free and 2,000/day Workspace. Mailroom enforces the cap so you never get rate-limited mid-campaign.

Markdown formatting

Write **bold**, *italic*, [links](https://) — Mailroom renders both an HTML and plaintext version so every email client looks right.

No extension to install

Mailroom talks to Gmail through the official API, so there is nothing to add to your browser and nothing that breaks when Gmail changes its interface.

No vendor lock-in

Your data lives in your own Supabase. Your sending reputation stays with your own Gmail. Cancel anytime — there's nothing to cancel.

How Mailroom compares to GMass, YAMM, and Mailmeteor.

The market for Gmail mail-merge tools is crowded. Here's the honest comparison.

MailroomGMassYAMMMailmeteor
Free tier300/day foreverLimited trial75/day trial1,500/month
Sends from your GmailYesYesYesYes
Mail merge tagsYesYesYesYes
Open trackingYesYesPaid onlyYes
Schedule sendsYesPaid onlyPaid onlyYes
Unsubscribe + suppression listBuilt inBuilt inBuilt inBuilt in
Monthly cost$0$25+/mo$24+/mo$10+/mo
Mailroom vs GMass →Mailroom vs YAMM →Mailroom vs Mailmeteor →

What are Gmail's actual sending limits?

A common reason people give up on mail merge — they hit invisible Gmail limits and get rate-limited. Mailroom knows the rules and stays inside them.

500
per day · free Gmail

Personal @gmail.com accounts can send up to 500 recipients per 24-hour rolling window via the Gmail API.

2,000
per day · Workspace

Google Workspace accounts get 2,000 recipients per 24-hour rolling window. Mailroom detects which tier you're on automatically.

~250/hr
soft hourly cap

Gmail also enforces a soft per-hour cap. Mailroom paces sends with a small delay between messages to stay under it.

Frequently asked questions

Is Mailroom really free?
The free tier is free forever, with no credit card and no trial expiry: 300 emails a day across two connected Gmail accounts, with merge tags, scheduling, open tracking, templates and unsubscribe handling all included. Most free mail-merge tools cap you at 50 to 75 sends a day, so 300 is several times the nearest free alternative. There is also a Pro tier at £19.99/month for people who need Gmail's full 500/day or more than two accounts — and every new account gets 14 days of Pro free, without a card.
How is this different from GMass, YAMM, or Mailmeteor?
GMass, YAMM, and Mailmeteor are paid Chrome extensions that sit inside Gmail's web UI. Mailroom is a standalone web app that talks to Gmail via the official API. The result is the same — personalized emails sent from your address — but Mailroom is free, sends without touching Gmail's UI, and includes scheduling, open tracking and unsubscribe handling at no cost.
Will my emails land in spam?
Mailroom sends through the same Gmail API that the Gmail web app uses, so your messages get exactly the same sender reputation and inbox placement as a one-off email you'd type by hand. There's no shared relay, no third-party SMTP, no IP that other senders have burned. Your reputation is your own.
Can I send 1,000 emails from a free Gmail account?
Not in one go — Google caps personal @gmail.com accounts at 500 unique recipients per 24-hour rolling window. Mailroom enforces this and tells you the remaining quota before you send. For 1,000+ daily sends, you need Google Workspace (cap is 2,000/day) or you can split the list across two days.
Does Mailroom store my email content?
Subject lines and bodies are stored in your Supabase project so you can edit, resume scheduled sends, and view history. They're encrypted at rest and never shared with anyone. Your Gmail refresh token is stored encrypted so Mailroom can send on your behalf — you can revoke it at any time from myaccount.google.com/permissions.
Is bulk emailing from Gmail allowed by Google?
Yes — as long as you stay under the daily sending limits and your recipients have a legitimate reason to hear from you (existing customers, opt-in subscribers, business contacts). Sending cold spam to scraped lists violates Gmail's ToS regardless of which tool you use. Mailroom includes an unsubscribe footer and suppression list specifically to keep your sends compliant.
What kind of merge tags can I use?
Any column in your CSV becomes a merge tag. Drop {{first_name}}, {{company}}, {{custom_field}} anywhere in your subject or body. Empty cells render as an empty string by default. Tags are case-sensitive and use double curly braces.
Can I schedule sends for later?
Yes. Pick any future date and time, and Mailroom queues the project. A cron job runs every five minutes and dispatches scheduled sends when their time arrives, even if you're offline.
Does Mailroom read my inbox?
No. Mailroom requests only the gmail.send scope, which permits sending and nothing else — it cannot read, list or search your mailbox. That is the narrowest Gmail permission that allows an app to send on your behalf.

Stop paying $25 a month to email your own contacts.

Connect Gmail, drop a CSV, hit send. The whole thing is free.

Get started with Google