Send E-mail to Muti Receipients in PHP

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Perl

PHP

I try to use mail() function in php to sent to someone but it always show 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 C:\wamp\www\PHP\Email\sent_mail.php on line 7
We encountered an error sending your mail"

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my code:

$to = "abc@gmail.com";
$subject = "Test";
$email = "dsb@gmail.com"
$message = "Hello"
$headers = "From:$email";
$sent = mail($to, $subject, $message, $headers) ;
if($sent)
{print "Your mail was sent successfully" }
else
{print "We encountered an error sending your mail" }