I used my own email id(plus a few more) and my actual email wasn't in search results. Looks like they just do standard string combinations.
Our aim is to source publicly available information and build a profile of a prospect for use by our clients. Maybe I am missing something and if I could see an explanation of their process that would engender more trust in their results.
Back to writing my own data mining tools..
I am particularly good at debugging, and I greatly enjoy it, but it is quite uncommon that I am offered purely debugging jobs.
I've had the idea of scouting around for well-financed programs that totally suck, then contacting their publishers to offer my service of fixing their broken code.
I haven't had any bites yet. Your service is very encouraging to me.
But mostly email addresses this tool predicts are not true.
I was actually looking around for <famous VC>'s email and it produced one for me.
It does check that the domain is not "catch-all", or that it doesn't simply ignore our queries.