Can I buy an email list?

Excuse me, I'm curious about something. I've been thinking about expanding my marketing efforts, and I came across the idea of purchasing an email list. Now, I'm wondering if this is something that's actually allowed or feasible? I understand the importance of building a legitimate and engaged audience, but I'm wondering if there's a shortcut to reaching a larger audience through an already compiled list. Could you please clarify if buying an email list is a viable option, and if so, what are the potential risks or drawbacks associated with it? Thank you for your time and expertise.