How is my security and privacy protected?

The app only has email-send permission while you're using it - it cannot read your inbox or perform other actions. The auth token expires every 1-2 hours, and credentials are stored only in your browser. Since everything happens locally, your data (contacts, emails and send history) will never be sent to any external server.

Will my bulk emails be marked as spam?

Emails are sent from your own Gmail account, so they're treated like regular personal emails. A few hundred to a few thousand emails are usually fine, but sending identical content repeatedly may trigger spam filters. To reduce the risk, send in smaller batches and personalize your emails with template variables.

How many emails can I send at once?

Send Bulk Email itself has no limits, but Gmail allows up to 500 emails per day. If you need to send more, spread them across multiple days.

How does this compare to MailChimp?

MailChimp and similar services offer better deliverability through dedicated sending infrastructure. Send Bulk Email is best for simple, quick campaigns - no signup, no fees, no learning curve.

I originally built this for myself. I needed to send cold emails for my own app, but services like MailChimp felt overkill and expensive for what I needed. I'm happy to share it with anyone who has the same problem.

Can I schedule emails?

Not yet, but scheduled sending is coming soon!

Can I create HTML or visually rich emails?

Right now you can use text formatting (headings, subheadings) and attach images and files. Full HTML email editing is on the way — coming in an upcoming release!

Can I use this for newsletters?

Yes! Send Bulk Email works great for newsletters. Import your subscriber list, compose your newsletter with the rich-text editor, personalize with template variables, and send — all for free through your Gmail account.

How to Send Bulk Email from Gmail for Free (Without Losing Your Mind)

When I launched my first product, I spent a full hour sending 100 cold emails from my Gmail account. One at a time. Paste, personalize, send. Paste, personalize, send.

By email number 50 I was copying the wrong names into the wrong messages.

By 100 I realized I had no idea who actually opened anything.

If you're about to do the same thing - don't. Here's what I wish someone had told me before I burned that hour.

BCC Is Not Bulk Email

The first instinct is to open Gmail, paste 100 addresses into BCC, and hit send. It feels efficient.

Gmail compose window with many addresses pasted into the BCC field

But here comes the caveat.

Everyone gets the exact same message - no first names, no personal hook, nothing. Spam filters flag identical messages to big BCC lists almost instantly.

Even if it works technically, the reply rate is awful. People can smell a mass blast in three seconds.

Mail Merge Is the Right Answer (But Wait for It)

Mail merge is the Mail merge is a technique that automatically personalizes emails by inserting individual recipient data — like names or addresses - into the template. Each recipient gets their own email, with their name and details filled in.

Gmail treats it like normal personal email. Deliverability is good.

The problem: setting it up yourself is a headache.

You will need at least

a spreadsheet
a template with {{variable}} placeholders
a script or add-on that pulls one and stuffs it into the other
and some way to throttle sends so Gmail doesn't lock you out

And even after all that, you still have no tracking. You have no idea who opened, who clicked, or who ignored you.

What You Actually Need

Strip it down. You need:

Personalization - at minimum, first name in the subject or opening line.
Open and click tracking - so you know which emails landed and which didn't.
Rate limiting - so Gmail doesn't flag you as a spammer.
No duplication - never send twice to the same address.
Easy unsubscribe - one-click, tracked, required by law in most places.

Any tool that covers these five things will beat hand-sending by a mile.

When Gmail Stops Being Enough

Gmail is great for anything under 500 emails per day. Cold outreach, small newsletters, customer update blasts - all fine.

If you're sending tens of thousands per week, or running automated drip campaigns with conditional logic, a dedicated ESP(email service provider) like Resend or Postmark will serve you better. Different tool for a different job.

But most people don't need that. Most people need to send 200 emails to their waitlist and actually know who read it. Gmail with mail merge tool can do that.

Don't send 100 emails by hand. I did it so you don't have to, and the only thing I got out of it was wrist pain and a lesson.

Pick a decent mail merge tool (sendbulk.email is a good free starter), personalize the contents, and watch who actually engages. That last part is the whole point. Everything else is just plumbing.