Send professional HTML email invitations with hidden guest lists. Perfect for businesses, events, and organizations needing to send thousands of emails efficiently.
Download NowEverything you need for professional email campaigns
Send thousands of professional email invitations in batches with optimized rate limiting and SSL error handling.
Create beautiful, professional email templates with HTML support for a polished look.
Protect privacy by hiding guest lists and organizer information in all email invitations.
Optimized for thousands of emails with sequential processing and automatic retry mechanisms.
Protected with a secure license verification system to ensure authorized usage.
Monitor your email campaigns with detailed progress tracking and success rate statistics.
Choose the version that fits your needs
Follow these simple steps to get started
Download the application for your operating system (Windows 7-11, Mac, or Linux) and extract the files using the provided password.
Launch the application and verify your license. The app includes a secure verification system to ensure authorized usage.
Upload your Google credentials.json file and authenticate with your Google account to access the Gmail Calendar API.
Upload your email list in TXT or CSV format. The app will automatically validate and count all valid email addresses.
Set up your event title, professional HTML email body, timing, and other settings in the intuitive interface.
Click "Start Enhanced Batch Processing" to begin sending professional email invitations with hidden guest lists.
Visit console.cloud.google.com and create a new project or select an existing one.
Navigate to "APIs & Services" > "Library", search for "Google Calendar API", and enable it for your project.
Go to "APIs & Services" > "Credentials", click "Create Credentials", and select "OAuth client ID".
If prompted, configure the OAuth consent screen with your app information and save it.
Select "Desktop Application" as the application type and give it a name.
Download the JSON file containing your credentials and save it as "credentials.json" for use in the G4 Mailer app.
Available for Windows 7, 8, 10, 11, macOS, and Linux
All versions are included in the same download package
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