Today I discovered I’d been accumulating huge amounts of unimportant emails. Emails that I needed to keep for 30 days, but after which are completely meaningless. Unfortunately, deleting millions (over 1,000 per day over 4 years) of email messages isn’t easily achieved.
Thankfully, Google Script allows you to interact with Google Apps (including Google Mail) using Javascript executed on Google servers to perform tasks, even timer based tasks like CRON. This makes running a task daily to trash old emails simple!