Contact form sending automatic response but not message itself

I've been detailing this at http://drupal.org/node/350136

The contact form is not sending the message to the contact form recipients, but IS emailing the auto-reply to the submitter. When using the form, the messages seems to be successfully submitted (with the 'Your message has been sent' on the following page). Mail_logger shows 2 emails per attempt - one sent to the recipient of the contact form, and one sent to the submitter.

Obviously, the overall php mail function is working because the submitter recieves the auto-reply. The address supposed to receive the contact form emails does not receive the messages (I doublechecked the spam folders and tried several different emails, including ones that did not share the same domain name).

I'm totally stumped. I'm going to play with the SMTP module to see if I can at least get this working for the timebeing.

thank you, Arp.