HELP! with simple contact form issue

[gma216]

I have used this simple contact form script everywhere, and worked perfectly fine, but on one particular server its getting the following error:

 

Warning: mail() [function.mail]: SMTP server response: 550 <gma216@gmail.com> No such user here in C:\Inetpub\ScanWest\2007\send_mailing_list.php on line 27

ERROR

 

and line 27 is as follows:

 

$send_contact=mail($to,$subject,$content,$header);

 

How come it's not working on this server, is it the PHP setting?

 

Any help would be much appreciated.

 

Thanks!!!

[pyrodude]

http://www.phpbuilder.com/board/archive/index.php/t-10263152.html Some people had a similar problem.  It was either that your SMTP requires authentication, or you're submitting an invalid From: header.