Jazz email notification is not working "No Connection"

Hello,

I configure the E-mail Settings with these informations :

E-mail Settings      
Preview   
Connection Properties
Property            Current Value       
Enable E-mail Notification    true   
SMTP Server            smtp.magna.global   
SMTP Server port        25   
SMTP Username            pjouen   
SMTP Password            **
Restrict To Whitelist        false   
Whitelist            none   
Debug Mail API            false   
E-mail From Address        jazz@magna.com   
E-mail From Name        Jazz Server    
SMTP Reply Address        none   
Transport Reuse Count        19   
Use STARTTLS            false  

But when I try to send a test email a get the error "no connection"

Has someone an idea ? Where can I find log files  ?

Thanks

       P. Jouen