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Do not use your school or work email to sign up for things, unless they are specifically school or work related.

This is not a "they are watching you" thing, although with your work email there's an element of that, it's a "you might not have access to this email later" thing.

Your best bet is to open two gmail (or any other long-standing free email) accounts. One, you use to sign up for stuff. The other you use to talk to people. You may occasionally use the first to talk to companies, but it's going to fill up with spam soooo goddamn fast-- even just from the people you signed up for.

But the point is that this email address will be available if you drop out/quit, get kicked out/fired, or graduate. Yes, I know a lot of colleges give free email for life to alumni. That can change, especially as most of those colleges haven't thought about the server/storage costs of such a promise in perpetuity. If you do have such an email, you'll want to sign into it regularly, if only too see if the school has sent you a notice explaining what you need to do to keep this email, and what date you need to do it by, and how apathetic they're going to be if you didn't read it and lost the email.

You can't reset the password for an email you can't access, so don't provide an email that can be taken away from you with little or no notice. (When I got laid off from my job at a fortune 500 company, I had twenty minutes before they shut off my email.)

I would say 5% of the calls I take are people who desperately need access to an email that no longer exists, because they signed up for something important with it, and now they can't reset their password.