I was wondering if there was some sort of data breach at Norton revealing customer emails. For last couple of weeks, I have been getting multiple emails every day with Norton 360 Renewal in the subject line. Yet when I hover my cursor over sender's name, it shows a gmail email address, not a Norton email address. So I am presuming these are phishing emails, especially since I am not due for renewal soon. Every one I've gotten has been from a different name and different gmail address. I have cautiously not opened any of them so I don't know what they say beyond the subject line. The question is, how do all these phishermen know that I have Norton 360?
[Edit: Clarified Subject]