Your SMTP server is denying relay - go the IIS manager, select SMTP and the properties and allow relay for localhost Alan "Gerardo Rojas" <grojas@strategicinc.com> wrote in message F0EDCD6B96C14741A2F6B0BE6EB7D9CF6D705E@scsprdm.strategicinc.com">news:F0EDCD6B96C14741A2F6B0BE6EB7D9CF6D705E@scsprdm.strategicinc.com... I am trying to send mail with the mail() function. My environment is Win2K proffessional. IIS5.0 and my email server is Outlook. This is the error I'm getting when i try to send mail. i have changed the php.ini file for: SMTP = my mail server ------------------------- Creating socket Successfully created socket! Warning: mail(): SMTP server response: 550 5.7.1 Unable to relay for grojas@strategicinc.com in c:\inetpub\wwwroot\gerardo\software\php\sockets\mail_server.php on line 25 ------------------------- -- Gerardo S. Rojas mailto: grojas@strategicinc.com -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php