Ive participated in 8 ICO's and have never seen this before. I contributed ~1ETH to this ICO, I received an email an hour or so later I got an email that stated:

"We have received your investment.

For additional confirmation please provide us with the TxHash."

Is it safe to give this out? The email address is @(ICOS name).io so it seems legit on that front but thats all I have to go by.


Ive just never had this request before so I wanted to check with the community... Advice?