Cannot get email notifications to work

I am running WebIssues server 1.0.2. My server is hosted with GoDaddy. The WebIssues server is located at http://childwelfare-collaborative.org/referrals

Options I filled in on the WebIssues/Email Settings panel:
Standard PHP mail
Email address of the server: referrals@childwelfare-collaborative.org
For hyperlinks, the server URL is: http://childwelfare-collaborative.org/referrals/

I have a cron job set up. The command the cron job is running:
/web/cgi-bin/php5 "$HOME/html/referrals/cron/job.php"

The cron job runs every 15 minutes. The WebIssues Event Log shows a record of the cron job starting and finishing at :00, :15, :30, and :45 of each hour.

My correct email address is set up on my User Preferences.

I have an Alert set for a folder to send immediate notifications.

Despite all this, no emails come to me. Any thoughts on what I doing wrong?

Thank you,
Jonathan