When a user sends a message through the form the server shows a 500 error.

This is what it looks like in the server error log:

" [Thu Feb 1 20:36:39 2007] [error] [client 200.xxx.xx.xxx] malformed header from script. Bad header=No recipient addresses found i: "

I get the the message in the webmaster's address inbox which was configured in the backend, even when the user wants a copy of the message in his/her inbox but the sender never gets a copy...

I don't know what to do.. The fact is that I need the sender gets a copy of the message in his/her inbox also...

Is it a bug or something misconfigured? Is there a way to go over this? any solution, sugestion? Thanks to you all in advanced. :(

I do only speaks English and Spanish... I wont understand replies in german, sorry... :(

Kind regards from Argentina.