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by hawaiian 2543 days ago
Whatever happened to hosting your signature as an image at cutepersonalizedname[.]com and logging the IPs yourself?

It probably wouldn't take much work to use Automator.app to periodically uniquify the src URL in your sig and map Sent Item => unique hash into a sqlite database, later asynchronously updating it with IPs seen from an nginx server hosting your image. Presto, you're a "superhuman".