Good call.
You're in.

Your email landed on my desk. Well, my server's desk. Either way, the paperwork's been stamped and you're officially on the list.

Before you wander off, three small jobs, they take thirty seconds and they're the difference between getting the emails and your inbox eating them:

Do this now, thank me later.

Check your inbox. There's an email from me waiting. If it asks you to confirm, click the link, no click, no emails. That's how consent works and I take it seriously.
Not there? Check spam or promotions. Email providers love quarantining anything with a personality. Drag it to your primary inbox to teach them better manners.
Reply to it. Even just "oi". It tells your email provider we're mates, and it tells me you're a human and not one of the bots that signs up to rip me off.

Good call.You're in.