Holy shit, 20 million emails, are all of them valid, or is that out of the entire site put together? Because if it's just you, 32k accounts is a lot to check through haha.
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I'm not sure what pelican phishing is, but you ought to try ratting, it's more ensured way of getting the people, you don't have to spam thousands of people in hopes you get one rich person, or even one person at all. With ratting, you know who you're aiming for, unless you simply spam your rat link, although you will have much more control of your victim.