Use "Send to → Mail recipient" with Gmail.

The open-source MAPI-to-Gmail bridge for Windows.
Works with any app. Chrome & Edge. Free forever.

The Problem

Gmail has no MAPI support. Windows applications use MAPI to send files by email — right-click a file, select “Send to → Mail recipient”, and it opens your mail client. But if you use Gmail or Google Workspace, nothing happens.

Affixa , the popular third-party bridge, has been discontinued. go-mapi is the open-source replacement.

How It Works

go-mapi bridges the gap between Windows and Gmail using three lightweight components:

Intercept

A lightweight DLL captures mail requests from any Windows application — Explorer, Office, PDF readers, ERP systems.

Bridge

A native messaging host picks up the request and relays it to your browser securely. No cloud servers involved.

Compose

The browser extension creates a Gmail draft with all attachments. Review and send, or save as draft.

Key Features

Zero Configuration

Install the extension, run the installer — done. The installer auto-detects your extension ID. No manual setup.

Works Everywhere

Any Windows application that uses “Send to → Mail recipient”: Explorer, Office, Adobe, ERP systems, scanners.

Chrome & Edge

Full support for both Google Chrome and Microsoft Edge. Same extension, same experience.

Draft or Send

Choose to create a Gmail draft for review, or send immediately. You’re always in control.

Enterprise Ready

Unattended installation, GPO deployment, force-install via Chrome/Edge enterprise policies.

Open Source

Fully open source. Audit the code, contribute, or fork it. No vendor lock-in, no subscription.

Quick Start

Getting started takes less than 2 minutes:

irm https://raw.githubusercontent.com/marcfargas/go-mapi/main/scripts/install.ps1 | iex

Install the browser extension first, then run the installer above in an admin PowerShell. That’s it — right-click any file → “Send to” → “Mail recipient” → Gmail.

Download & Install

Who Is This For?

Google Workspace admins looking for an Affixa replacement
IT departments deploying Gmail in Windows environments
Power users who need “Send to → Mail recipient” with Gmail
Developers working with Windows applications that send email

Coming Soon

We’re actively developing new features:

📋 Mail queue management — hold, review, and send from the browser
👥 Multiple account support — choose which Gmail account to use
🔗 Re-threading — attach emails to existing Gmail conversations
⚙️ Settings page — configure draft-by-default, signatures, and more
📧 SMTP support — send via SMTP as an alternative to Gmail API
🔒 Domain restrictions — limit sending to approved domains