<?php
function send_mail($emailaddress, $fromaddress, $namefrom, $emailsubject, $body)
{
  $eol="\n";
  $mime_boundary=md5(time());

Common Headers
$headers .= "From: $namefrom <$fromaddress>".$eol;
  $headers .= "Reply-To: $namefrom <$fromaddress>".$eol;
  $headers .= "Return-Path: $namefrom <$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;
  $msg .= "Content-Type: text/plain; charset=iso-8859-1".$eol;
  $msg .= "Content-Transfer-Encoding: 8bit".$eol;
  $msg .= strip_tags(str_replace("<br>", "\n", $body)).$eol.$eol;
HTML Version
$msg .= "--".$mime_boundary.$eol;
  $msg .= "Content-Type: text/html; charset=iso-8859-1".$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";
    return 1;
}
?></pre>