mail() authinication to exchange?

[Anon]

I am trying to send mail externally from my SMTP server(exchange 2000) using mail() function.

I have no problem if I send to a internal address ([e-mail]), however if I try to sent to a external address ([e-mail]) I recieve Warning: Server Error, do I need to authinicate to the exchange server who I am so I can send external e-mail, or is this a different problem?

Thanks

**************configuration***********
PHP4.04
Exchange 2000
IIS 5.0
open relay(closed)

[ame12]

Sounds like an Exchange configuration.

Check the Routing tab of the Internet Mail Service Properties sheet (Do not reroute incoming SMTP mail and Reroute incoming SMTP mail).

RW

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[corsc]

I'm sorry but i don't agree with Randy, I have experienced this before and as you can send internally I dont think that its an exchange problem.

From memory I fixed this problem by making sure that the headers you submit to the server are in the correct format and that there is a default address/user specified in the php.ini file.

Dont worry what you set in the php.ini file as you can easily overide it by setting the from info in the header info.

eg
$header = "From: [e-mail]\n Reply-To: [e-mail]"
$to = "[e-mail]";
$message = "You should know what goes here!";
$subject = "Blah Blah";

$send_result = mail( $to, $subject, $message, $header );

// ofcourse the reply to is optional, but for reliable operation I have found that
// you must alteast have a from address.

[Anon]

I am still recieving this error

Warning: Server Error in C:\Data\theweb\wwwroot\test_mail.php on line 7

this is my source code

<?
$header = "From: [e-mail]\n Reply-To: [e-mail]";
$to = "[e-mail]";
$message = "You should know what goes here!";
$subject = "Blah Blah";
$send_result = mail( $to, $subject, $message, $header );
?>

any ideas?

Also

If I change the $to variable to an interneal e-mail address the script works. what is the problem!!!!!!!!!!!!!!

Thanks

[Anon]

It might have something to do with Exchange settings anyway!

How is Exchange set up to reroute mail?
forward all incomming messages to? og
use DNS?

Exchange also has rules for relaying!
"Only relay if sender is homed on this server" OR "Relay from all"

Hope this can be af any help