Legal
Privacy policy
Effective October 5, 2026. This policy covers the Mass Email Chrome extension (“Mass Email”, “we”) published by EthanApp, and this website.
1. What Mass Email handles, and why
| Data | What happens to it |
|---|---|
| Your Google sign-in | Chrome's identity service signs you in to Google and gives Mass Email an access token with two permissions: gmail.send (send email as you) and userinfo.email (your email address, shown in the extension and used as the sender). Mass Email cannot read, search, label or delete messages in your mailbox. |
| Emails you send | Each email you start is built on your computer and sent through the Gmail API, from your account, to the recipient. It appears in your Gmail “Sent” folder like any other email. |
| Contact lists and campaigns | Rows you upload (CSV), paste, import from a Google Sheet or collect from a web page, your drafts and your campaign history are stored in Chrome's local extension storage on your computer. They are never sent to us. |
| Google Sheets import | When you paste a Sheet link, Mass Email downloads that sheet as CSV using your own Google session in Chrome, after Chrome asks you to allow access to docs.google.com. The file is read on your computer. |
| Addresses from a web page | Only when you click “Collect addresses from the open page”, Mass Email reads that tab's text and mailto: links to find email addresses. Chrome asks for permission per site. Nothing else is read. |
| AI writing | With Chrome built-in AI, writing happens on your computer and nothing is sent anywhere. With Claude, your brief, the email you ask it to edit and, for personal lines, the recipient's row are sent to Anthropic's API using the API key you entered. Anthropic's privacy policy applies to that request; we never receive it. |
| Settings and your Anthropic API key | Stored in Chrome's local extension storage on your computer, and the key is sent only to api.anthropic.com. |
| The button on Gmail | Mass Email adds a small button to mail.google.com that opens its panel. It does not read your emails or the page. |
2. What we don't do
- We run no server that receives your data, and there is no Mass Email account.
- No analytics, advertising or tracking code in the extension or on this website.
- No open or click tracking in the emails you send.
- We don't sell, rent or share your data, and no person at Mass Email can see it.
- We don't use your data to train AI models.
3. Google user data (Limited Use)
Mass Email's use and transfer to any other app of information received from Google APIs will adhere to the Google API Services User Data Policy, including the Limited Use requirements. Mass Email uses Google user data only to send the emails you ask it to send and to show which account is sending. It is not transferred to anyone, not used for advertising, and not read by humans.
4. Who receives data
- Google, to sign you in and to deliver the emails you send (under Google's privacy policy).
- Anthropic, only if you choose Claude as the AI, for the writing requests described above.
- Your recipients, who receive the emails you send them.
5. Keeping and deleting data
- Delete a campaign in Mass Email (Campaigns → Delete) to remove its recipient list from your computer.
- Uninstalling the extension removes everything it stored.
- Settings → Disconnect signs Mass Email out of Google. You can also remove its access at myaccount.google.com/permissions.
- Emails already sent stay in your Gmail and in the recipients' mailboxes.
6. Security
Data is stored in Chrome's extension storage, which is protected by your computer's user account, and every request to Google and Anthropic uses HTTPS. Anyone with access to your Chrome profile can see what Mass Email stores, including your Anthropic API key, so keep your computer and Chrome profile secure.
7. Your recipients' data
You decide whom to email and what data to import, so you are responsible for having a lawful reason to contact them and for honoring unsubscribe requests (see the terms of service). Mass Email helps with an unsubscribe line, an unsubscribe header and a list of addresses every campaign skips.
8. This website
This website is a static site with no cookies, analytics or forms. Our hosting provider (Cloudflare) may process technical data such as IP addresses to deliver and protect the site.
9. Children
Mass Email is a tool for adults and is not directed at children under 16.
10. Changes and contact
We will update this page and its effective date if Mass Email starts handling data differently. Questions or requests: ethanhdt@gmail.com.