Go Daddy is problematic at best on sending emails.
I Have seen their SMTP Server take a day or 2 in some cases relaying emails, I dont think i would relay on GoDaddy hosting for sending a large mailing.
I have had numerous problems with GoDaddy and sending emails. In my experience, sending emails using Go Daddy will only work if you are using a linux hosting account with PHP 5.
The GoDaddy SMTP Servers are:
relay-hosting.secureserver.net - port 25
smtpout.secureserver.net - port 80
make sure that the from address is a valid address for the domain.
even when the settings are correct though, the GoDaddy servers can be quite slow in sending.
Where the mailing stopped after sending 47, i would suspect that the email limits where reached, go daddy is pretty strict on the emails that can be sent.
if you stop and restart the mailing, it will only send to the addresses in the mailing list that have not already been sent to.
the mailing list order is by UserID.