Go daddy email setting in Prestashop

[alirm]

Hi guys,
I have tried to configure all required setting for my email account with Go Daddy and connect it to my Prestashop but I still have a problem to connect it!!!
Here is my setting:
Mail Domain: ( I have no idea about it- Do I need to fill this section?)
SMTP server:smtpout.secureserver.net
SMTP user:*****
SMTP password: *****
Encryption: None
Port:25

It seems everything is ok but I am wondering why it doesn't still connect to prestashop!!
I will appreciate if some one read this post and help me to solve this problem...

Note: I am using last version of Prestashop 2011- and When I am sending a test email is working and I can receive it in my email but when I am trying to use contact form and send a new mail, the mail doesn't deliver to my account ).
In fact, I can send an email to customers but not receive any email from other

Thanks