— It doesn't sound like you need a tracker
— Or well, the person who asked haha
— The best way IMO is to look for server response emails
— Https://developers.google.com/gmail/api/guides/threads
— I’m not sure how threads are going to help with server responses
— That's a good starting point
— They tend to respond to the original email
— They respond with a numeric code
— Https://stackoverflow.com/questions/5298285/detecting-if-an-email-is-a-delivery-status-notification-and-extract-informatio
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