This is obviously another scam and I'm glad you've not taking any step to send them your funds, the @_jacob.armstrong guy obvious saw you as a target he can easily prey on and out of him being smart, he thought it would be more convincing if he gave you a scam email which in created because i doubt if that email belongs to slushpool.com due to the fact that it dosen't end with .com rather it did with .com.uk! Scammers will always find ways to prey on people by devising any means possible