Privacy Policy

Last updated: March 12, 2026

1. What Maillifier Does

Maillifier is a free, open-source Google Apps Script project that you install into your own Google account. Once installed, the script processes emails you forward to it and generates AI-drafted replies using the Google Gemini API. This website provides information about the project and a free trial option.

2. Data We Collect

This website collects minimal data only for the POC free trial sign-up:

• Email address — used to send a verification code and trial access instructions. Stored only for the duration of the trial period.
• reCAPTCHA response — verified against Google's reCAPTCHA service to prevent abuse. Not stored on our servers.

3. Data We Do NOT Collect

• We do not read, access, or store your emails
• We do not access your Google Drive files
• We do not access your Google Docs or Sheets
• We do not store OAuth tokens after the installation session ends
• We do not use cookies for tracking
• We do not use analytics services that collect personal data
• We do not sell, share, or transfer any personal data to third parties

5. Data Processed by the Installed Script

The Apps Script installed in your account processes data entirely within your Google account:

• Forwarded emails — read by the script to generate AI responses. Under the Zero-Log architecture, processed emails are permanently deleted after a response is generated.
• Knowledge Base document — a Google Doc in your Drive that you create and manage. Contains business rules for the AI.
• Log spreadsheet — a Google Sheet in your Drive that records processing timestamps, sender addresses, and status. You control and can delete this at any time.
• Gemini API calls — email content is sent to Google's Gemini API for AI processing. This is governed by Google's Gemini API Terms of Service.

All of this data stays within your Google account and Google's infrastructure. Maillifier's servers never see this data.

6. Third-Party Services

• Google reCAPTCHA — used on the trial sign-up form to prevent abuse, governed by Google's Privacy Policy
• Google Gemini API — used by the installed script (in your account) for AI generation
• GitHub — source code is hosted publicly at github.com/maillifier/maillifier
• Firebase Hosting — this website is hosted on Google Firebase

7. Data Retention

Trial email addresses are stored only for the duration of the 7-day trial period and deleted afterwards.

Data created by the installed script (logs, Knowledge Base, email history) is stored in your Google account and is fully under your control. You can delete it at any time.

8. Your Rights

You have full control over Maillifier:

• Uninstall — delete the Apps Script project from your account at any time
• Revoke access — remove permissions at Google Account Permissions
• Delete data — delete the Knowledge Base doc, log spreadsheet, and any Gmail labels created by the script
• View source — the script code is open source and visible both in your Apps Script editor and on GitHub

9. Security

Maillifier is designed with security as a priority:

• Split-Scope architecture ensures the installer never accesses sensitive data
• All communication uses HTTPS/TLS encryption
• Gemini API keys are stored in Script Properties (encrypted by Google)
• Whitelist-based access control prevents unauthorized use
• Source code is publicly auditable on GitHub

10. Children's Privacy

Maillifier is not directed at children under 13. We do not knowingly collect personal information from children.

11. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated revision date. Continued use of Maillifier after changes constitutes acceptance of the updated policy.

12. Contact

For privacy-related questions, contact us at: support@maillifier.com

You can also open an issue on our GitHub repository.