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Have you enabled the php server to use the exchange server as a relay? and/or enabled Exchange 2007 to accept mail from non-authenticated clients (such as exchange)<br />
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Take a look at this: <a href="http://msexchangeteam.com/archive/2006/12/28/432013.aspx" rel="ugc">http://msexchangeteam.com/archive/2006/12/28/432013.aspx</a>
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Thanks for the tip.<br />
<br />
Turns out we'd already tried you idea to no avail.<br />
<br />
Solution ended up being putting a valid email address in php.ini for sendmail_from.<br />
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ALSO had to modify PHP code to remove &lt;&nbsp;&gt; from around email addresses.<br />
<br />
This is what we get for upgrading to PHP 5 and Exchange 07 at the same time.<br />
<br />
Cheers
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Recently upgraded to MS Exchange 2007 and PHP 5.<br />
Have tried many different combinations of PHP but no change.<br />
<br />
Originally was SMTP was set (in php.ini) to 'localhost' and returned this error:<br />
Warning: mail() [function.mail]: Failed to connect to mailserver at &quot;localhost&quot; port 25, verify your &quot;SMTP&quot; and &quot;smtp_port&quot; setting in php.ini or use ini_set() in D:\xxx<br />
<br />
Changed host to IP and now PHP script generating email returns this error:<br />
Warning: mail() [function.mail]: SMTP server response: 501 5.1.7 Invalid Address: need fully-qualified address in D:\xxx<br />
<br />
I've researched this error code but nothing seems realtive to this issue.<br />
<br />
Trying to discover whether this is a known issue or particualr to our setup.
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Recently upgraded to MS Exchange 2007 and PHP 5.
Have tried many different combinations of PHP but no change.

Originally was SMTP was set (in php.ini) to 'localhost' and returned this error:
Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in D:\xxx

Changed host to IP and now PHP script generating email returns this error:
Warning: mail() [function.mail]: SMTP server response: 501 5.1.7 Invalid Address: need fully-qualified address in D:\xxx

I've researched this error code but nothing seems realtive to this issue.

Trying to discover whether this is a known issue or particualr to our setup.

PHP mail generates error since Exchange upgrade

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.