قد يكون السبب عدم استخدام Headers صحيحة ..
كود PHP:
function send_mail( $emailaddress , $fromaddress, $emailsubject , $body )
{
$eol="\r\n";
$mime_boundary=md5(time());
# Common Headers
$headers .= 'From: MyName<'.$fromaddress.'>'.$eol;
$headers .= 'Reply-To: MyName<'.$fromaddress.'>'.$eol;
$headers .= 'Return-Path: MyName<'.$fromaddress.'>'.$eol; // these two to set reply address
$headers .= "Message-ID: <".$now." TheSystem@".$_SERVER['SERVER_NAME'].">".$eol;
$headers .= "X-Mailer: PHP v".phpversion().$eol; // These two to help avoid spam-filters
# Boundry for marking the split & Multitype Headers
$headers .= 'MIME-Version: 1.0'.$eol;
$headers .= "Content-Type: multipart/related; boundary=\"".$mime_boundary."\"".$eol;
$msg = "";
/*
# Setup for text OR html
$msg .= "Content-Type: multipart/alternative".$eol;
# Text Version
$msg .= "--".$mime_boundary.$eol;
$msg .= "Content-Type: text/plain; charset=windows-1256".$eol;
$msg .= "Content-Transfer-Encoding: 8bit".$eol;
$msg .= strip_tags(str_replace("<br>", "\n", $body)).$eol.$eol;
*/
# HTML Version
$msg .= "--".$mime_boundary.$eol;
$msg .= "Content-Type: text/html; charset=windows-1256".$eol;
$msg .= "Content-Transfer-Encoding: 8bit".$eol;
$msg .= $body.$eol.$eol;
# Finished
$msg .= "--".$mime_boundary."--".$eol.$eol; // finish with two eol's for better security. see Injection.
# SEND THE EMAIL
ini_set('sendmail_from',$fromaddress); // the INI lines are to force the From Address to be used !
@mail($emailaddress, $emailsubject, $msg, $headers);
ini_restore(sendmail_from);
//echo "mail send";
}
# To Email Address
$emailaddress="to@address.com";
# From Email Address
$fromaddress = "from@address.com";
# Message Subject
$emailsubject="This is a test mail ";
# Message Body
$body="This is a message with some <i>HTML</i>!";
send_mail($emailaddress, $fromaddress, $emailsubject, $body);
للمزيد
http://www.php.net/mail