If you’re not getting spam now, you will soon — and probably lots of it. What can you do? There’s no magic answer, but there are various things you can do to help.
Most email programs can block email from a specific address. Unfortunately, blocking email from a sender is ineffective when it comes to spam.
Sometimes you may want to explicitly keep someone from contacting you. Ignoring them is often simplest, but there are tools to help as well.