Ask HN: Is it possible to quantify responsiveness of “Who Is Hiring”?

Hi, One of the chief complaints I see on HN is that there seem to be a number of postings on "Who Is Hiring" where the emails listed don't see to be very responsive. I'm wondering if it's possible to build something that works similarly to Mixmax's email tracking, but for groups. The stats for a specific job post email could be stored at a url that would be generated from something like the hash(username+email listed+datePosted) or something of the like. When emailing a job posting, if everyone included something like this, it would give a huge amount of data about which emails were responsive or not. I wanted to ask those who know more about how Mixmax does this whether this is even possible--my understanding here is really limited to plugging in Amazon SES for startups; and I don't use Mixmax. Just wanted to float the idea out there, and fully expecting that it's not a great idea or not feasible, but just wanting to hear feedback.