Notification message from EF in my inbox

Hello, i've been encountering a problem concerning this site. When i get a notification message in my yahoo inbox from this site, like notification for a new private message, the subject shows this:
"new private message has arrived on , "

on where? the subject doesn't clearly state it. it should be

"new private message has arrived on Exclusive Forum,"

and the body is like this:

Hello ,

You have received a new private message to your account on "" and you have requested to be notified of this event. You can view your new message by clicking on the following link:

look at the italicized part which is incomplete there. there should be "Exclusive forum" between "on" & "and"

thank you

FOR ATTENTION

CaesaR you should really check the admin panel and configure it well. This also for improvement. The email we receive, the sender name is blank, and the subject new private message has arrived on""

The sendername should be Exclusive Forum or EF Staffs
Pinky, nice suggestion, i agree

The email system works fine with Hotmail...

…

But not fine with yahoo...

Thanks for the report, please wait patiently while this problem is being tried to be repaired.