BuddyPress.org

Ok, so I don’t think that there’s any function to know if the email bounced or not. So, BP would think that it was sent successfully even if it’s a fake email. You’d have to setup something to catch the bounced email to then know that it was bad or something. Unfortunately, email doesn’t respond with a successful reply when an email is received so that you’d be able to cue off of that.

I think the solution to the spam accounts that weren’t activated is a plugin that will allow people to easily clear out these never activated accounts.