This is using Google Apps Script built-in Gmail API to retrieve Gmail Draft, mail merge with any number of fields in a Google Sheet, then it will send out all emails with beautiful personalized email. There is no fancy UI nor complicated processing and therefore this is a tiny yet efficient mail merge Google Sheet Add-on.

Most of you are familiar with Excel or Google Sheets. With Contact List and control of mail merge in Spreadsheet format, there is almost no learning curve on how to use this. Configurations are "externalized" as configurations and therefore, it is not only easy for you to use but also prepared for future functions expansions.

Newer releases include more functionalities and bug fixes, all within cloud without downloading anything. New updates are delivered once it's published and all you have to do is if you are using the spreadsheet, reload the spreadsheet will automatically reload the most updated version of Add-ons.

No matter you are using Windows, Mac, Linux or even Chrome OS, as long as you can run Google Sheets on desktop version of browser, Small Outbox will be able to run fine.

We love free and so there is. You already own Google Apps, with a little help from Google Apps Script, you can send up to *1500 emails everyday. Perfect for small marketing campaign or education mailing list purpose. There is no catch, it's free forever.