PHP Mail function not working in Windows Server


I have trid the testing script as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
$headers = ''. "\r\n" .
    'Reply-To: [email][/email]' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();
$ret=mail('', 'subject', 'this is the content',$headers,'');
echo "<BR/>mail() returned: " . ($ret? "TRUE" : "FALSE") . "<BR/>";

This script works fine at another Linux server. But in the windows server i am using, the result is:

mail() returned: TRUE

but sending no mail at all.

The server setting is like:

Directive	      Local Value	               Master Value
sendmail_from	[email][/email]	[email][/email]
sendmail_path	     no value	                       no value
smtp_port	             25	                                25

I can't locate the problem cos I don't have access to server config...
Someone please tell me where the problem is..Thanks


I found the solution by myself:

ini_set("sendmail_from", "");?>

at the beginng of mail testing file.....

Question Self-Answered as of 6 Years Ago

For all of the people struggling with getting PHP mail() sending to some, but not all, recipients...look no farther. Your solution has been posted here.

It appears PHP-generated emails don't play nice on Windows mail servers. So, when your mail goes to anyone who uses a Windows mail server (Comcast, gmail, and maybe aol), the recipients won't get it. UNLESS YOU ADD THE LINE:


phpini_set("sendmail_from", "");


This is a miracle! I have been scouring the internet high and low, and this is the ONLY thing that has worked! Now I can move on to the rest of the project!

Thank you, MeixiuLin! Thank you, thank you.


Guys, i love you.


Excellent Solution by MeixiuLin, its working , keep it up :)


hi sir, i m also facing php email setting problem it show that mail() returned: TRUE, but its not sending mail, pls help me


I have a problem sending mails from my Windows Server. I am using IIS 7 and PHP 5.3.18
I would like to know if I need to configure my PHP.ini and how do I have to do it?
Thanks a lot for your help.


This post is dead, dont bring it back. Besides, dont hijack peoples post.


i need a send email code for windows server.Help me as soon as possible.


Above suggestion is not working with my code and windows server.plz give me actual solution.


i used window server and deploy php. I have smtp server to relay the email. I don't know where to configure it.

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