The email you received, can you post the email header details? (Additional email header details are usually not displayed by default, but you can turn them on and paste the details on here)
Is this the thing? :Bitmain Tech <
info@bitmaintech.com>
no see my edit above - what email client are you using?
[edit] better still, pm me the email header as it will contain your real email address (if you don't want it publically known)