Thanks for the reply. Some updates: it seems that PHP mail is actually sending OK, as I can receive email through either gmail or yahoo accounts. However. I cannot receive email through our example.com addresses. Our site is currently being hosted separately from our domain registrar(who also handles our mail/MX records). It seems that our web server example.com will NOT send email to our actual example.com email addresses, but rather the mail is kept internal to the web host. Where do I look to try to send the example.com email addresses to mailboxes that are outside of the web server? I hope this makes sense. I am a bit confused at this point.