Email Options - SMTP relay issues

[elementsofdance]

Hi Guys, I'm currently using vBulletin CMS version 4.1.10 on GoDaddy's Linux 4G hosting.

I just found out today that if I sent out a mass mail to my users (through GoDaddy's relay) that I am limited to 1000 emails per 24 hours.
Now to get around this, I am able to use my work's relay service.

As an alternative, I have tried to enable SMTP for outgoing mail so I have configured the proper fields in the Email options to do so; including mail server, user, password and port 2500 for sending mail.

I am receiving the following error message:

Emailing
Showing Users 1 to 1 of 1

1 - <user name here> ...... Emailing
Warning: fsockopen() [function.fsockopen]: unable to connect
to tcp:72.29.235.239:2500 (Connection refused) in
[path]/includes/class_mail.php on line 742
Okay


LINE 742 states:
$this->smtpSocket = fsockopen(($this->secure == 'ssl' ? 'ssl://' : 'tcp://') . $this->smtpHost, $this->smtpPort, $errno, $errstr, 30);


The page eventually refreshes and says emails sent successfully but I never actually get them.

Is there something I can do?

Thanks,

Chris