It's Nice Raj, now works.
I not think that this check box means this. I think that says at the MTA to check if the IP of the sender is the same in the DNS, for spam control.
The email arrive me in my Microsoft Outlook in the Junke e-mail, and i not know why. But now the server it's able to delivery.
Thank you very much.
... and
i'm happy to make you write your 100th post.
Bye.