The very first message is a contact one, more or less formal, that is polite and without excessive requirements. And personnaly facing to a second message too much requiring I use to tag it as scam. May be i'm too much conservative as I still don't understand one of these requirement saying i'm relying too much shortly. Looks like there on the other side of the communication channel, there may be some unexpecred real person filtrating me on my too much short reply  . That is.