Well... I can't really answer that with any certainty. Whoever possesses the private key that was generated, at the same time as the public key, can decrypt that message. Yes. But I mean, if you used the wrong public key to encrypt the message or something, the guy won't be able to decrypt it. But unless that happened -- yes, he can already decrypt that message. He can decrypt it even if you do expect a response, but if you don't include a public key for him to use to encrypt his response, he can't encrypt his answer.I mean if that's your encrypted address, then yes, it's all good.