Hey, quick question. I'm assuming these emails are automated, so how do they know your account's email? Is this part of a leak or are they sending email via "send notification to email" option in lemmy?

Click "instances" at the bottom of the page and scroll down to "blocked instances".

For lemmy.world: link

Ah. so that "[email protected]" is an email and this is not related to fediverse. Jus checked, there's no such account here. No point in making an announcement about it here if its not related to fediverse and only gets sent to domain owners, imho. lol