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Editorial Team
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Asked: 2026-05-30T18:57:54+00:00

I am struggling to send mails through PHP, running on IIS7. I have an

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I am struggling to send mails through PHP, running on IIS7. I have an SMTP server running on the server which I can access through telnet and send a mail through with no problems, and php.ini is configured as follows:

[mail function]
; For Win32 only.
SMTP = localhost
smtp_port = 25

When I run a simple PHP script to test the mail function:

    $to = "test@email.com";
    $subject = "Test mail";
    $message = "Hello! This is a simple email message.";
    $from = "someonelse@example.com";
    $headers = "From:" . $from;
    if(mail($to,$subject,$message,$headers))
    {
        echo('ok');
    }
    else
    {
        echo('not ok');
    }

ok is returned however no mail is received. I have set error_reporting(-1); and am getting no errors or warnings either. I’m stumped as to what could wrong?

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1 Answer

  1. Editorial Team

    I’ve just found the issue – it was the sendmail_from setting in php.ini. Even though the script is not using this value it seems like it has to be a well formed email address however it wasn’t. Setting it to test@mail.com and restarting the site has done the trick

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