What is this email? Where's the scam here?

I received a quarantine notice from my work’s email quarantine service. I went to the message in question and am a little confused as to what the point of the email is. Take a look:

What is this? Harvesting valid email addresses?

Could actually be legit. But I think you nailed it.

My guess is the second email (the response to your response) would be interesting…

Are you getting newsletters across various industries?
And even if you are, I don’t think they’d care. They just want the numbers, pretty much. I get calls all the time for trade rags not in my field, and the poor caller won’t take no, so I tell them to send an email version and direct it to spam.
Doesn’t look like phishing since they don’t direct you to a site to remove the newsletters. In fact, is any response even requested?
Maybe some newsletters are getting audited.