Conclusion
With about 130 lines of code it is possible to have a working piece of mailing automation on a Google Sheet. On top of the many possibilities a Google Sheet already gives, simple yet powerful solutions are accessible in an easy way. The Google Cloud environment offers many things out of the box, including connecting a sheet with a form, sharing code as library and creating deployments and versions. This can all be very useful to be able to tackle many of the more simple business use cases quickly.
