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This seems extremely ripe for abuse by scammers, I wonder what a legitimate use case might be?

• lxgr 3y ago
  Basically every business/marketing email you receive works like this: Every link you click is personalized and tells the sender that it was you reacting to their message (and from where as well, thanks to GeoIP). I can see the point in wanting to know whether your messages are reaching your target audience (or somebody else), but I don't really understand who would want to get that via SMS instead of via e.g. email? Email would be much cheaper.
• replygirl 3y ago
  i built something similar for the mailto link on my personal site, bc i'm bad at checking email and refuse to enable notifications for it