<?php
function reventarEmail($a, $asunto, $texto, $de, $aAdjunto, $tipo) {
$content = fread(fopen($aAdjunto,"r"),filesize($aAdjunto));
$content = chunk_split(base64_encode($content));
$uid = strtoupper(md5(uniqid(time())));
$name = basename($aAdjunto);

$header = "From: $de\nReply-To: $de\n";
$header .= "MIME-Version: 1.0\n";
$header .= "Content-Type: multipart/mixed; boundary=$uid\n";

$header .= "--$uid\n";
$header .= "Content-Type: text/plain\n";//puedes expecificar que sea texto plano o codigo html con text/plain o text/html
$header .= "Content-Transfer-Encoding: 8bit\n\n";
$header .= "$texto\n";

$header .= "--$uid\n";
$header .= "Content-Type: $tipo; name=\"$name\"\n";

$header .= "Content-Transfer-Encoding: base64\n";
$header .= "Content-Disposition: attachment; filename=\"$name\"\n\n";
$header .= "$content\n";

$header .= "--$uid--";

mail($a, $asunto, "", $header);
return true;
}
?>

#
                 'application/x-gzip-compressed' => '.tar.gz',
#
                 'application/x-gzip-compressed' => '.tgz',
#
                 'application/x-zip-compressed' => '.zip',
#
                 'application/octet-stream' => '.rar',
#
                 'image/bmp' => '.bmp',
#
                 'image/bmp' => '.ico',
#
                 'image/gif' => '.gif',
#
                 'image/png' => '.png',
#
                 'image/jpeg' => '.jpg',
#
                 'image/jpeg' => '.jpeg',
#
                 'application/x-shockwave-flash' => '.swf',
#
                 'application/msword' => '.doc',
#
                 'application/vnd.ms-excel' => '.xls',
#
                 'application/octet-stream' => '.exe',
#
                 'application/octet-stream' => '.fla',
#
                 'application/pdf' => '.pdf',
#
                 'audio/mpeg' => '.mp3',