You never know, some vendors send you the download link / license file via email, so at least that part needs to be legit.

Just use a temporary email from some temporary email generator like https://temp-mail.org/ (use an AdBlock, I'm sure the site is littered with ads, but I wouldn't know cause I use uBlock)

Those are often blacklisted though, same as any mails on free TLDs.

That's what I thought too, but it's just a datawall, the link is available right after submitting.

So go ahead and John Doe it.

Just try once to check if they send the email?

you can use a disposable email https://temp-mail.org/

Or just maintain a personal throwaway email that's not tied to your real life identity