Can't send mails to only Hotmail. (gmail, etc. works perfectly)

Question

I need your help. I have a php script to send email to people who register. but that script does not work for hotmail. hotmail users do not receive that email at all. not even in the junk folder. it works perfectly ok for yahoo! Mail. what am i doing wrong. here's the basic mail script:

 $to      = 'info@mydomain.nl, ****@hotmail.com, ***@live.nl';
 $subject = 'the subject';
 $message = 'hello';
 $headers = 'From: webmaster@example.com' . "\r\n" .
     'Reply-To: webmaster@example.com' . "\r\n" .
     'X-Mailer: PHP/' . phpversion();

 mail($to, $subject, $message, $headers);

Result: only info@mydomain.nl recieved the mail.

How can I fix this?

Btw, my contact script works great with hotmail.

Check your spam folder (ongewenste e-mail). It's probably Hotmails spam filter that filters out messages like this. — GolezTrol
@Brad what do you mean? or how can i see it? at>GolezTrol Nope, spam folder is empty ): — Ibra038
@user1303265, Use Wireshark (wireshark.org). No doubt you will see a message from Hotmail saying you are flagged for spam. — Brad

dAm2K dAm2K · Accepted Answer · 2012-04-02T15:39:53

It's not a PHP problem. Those bad mail providers make use of non standard aggressive anti spam policies that silently drop incoming emails.

You should call your sysadmin and let him check the MTA on your PHP servers. Usualy it's a better solution to use the MTA relay given by your PHP Internet Service Provider instead of using a standalone MTA like sendmail on your PHP server machine.

HTH.

Can't send mails to only Hotmail. (gmail, etc. works perfectly)

2 Answers