Я улучшил код с http://ru.php.net/manual/ru/function.mail.php#105661:
<?php
function multi_attach_mail($to, $subject, $message, $files, $sendermail){
// email fields: to, from, subject, and so on
$from = "Files attach <".$sendermail.">";
//$subject = date("d.M H:i")." F=".count($files);
$message .= "\n".count($files)." attachments";
$headers = "From: $from";
// boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\"";
// multipart boundary
$message = "--{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" .
"Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n";
// preparing attachments
for($i=0;$i<count($files);$i++){
if(is_file($files[$i])){
$message .= "--{$mime_boundary}\n";
$fp = @fopen($files[$i],"rb");
$data = @fread($fp,filesize($files[$i]));
@fclose($fp);
$data = chunk_split(base64_encode($data));
$message .= "Content-Type: application/octet-stream; name=\"".basename($files[$i])."\"\n" .
"Content-Description: ".basename($files[$i])."\n" .
"Content-Disposition: attachment;\n" . " filename=\"".basename($files[$i])."\"; size=".filesize($files[$i]).";\n" .
"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
}
}
$message .= "--{$mime_boundary}--";
$returnpath = "-f" . $sendermail;
$ok = @mail($to, $subject, $message, $headers, $returnpath);
if($ok){ return $i; } else { return 0; }
}
multi_attach_mail("to@somebody.dom",
"Subject of mail" ,
"Hello world!!!",
array($_SERVER["DOCUMENT_ROOT"] . "/first.file", // one file in root of your site
$_SERVER["DOCUMENT_ROOT"] . "/second.file" // another one
),
"from@someone");
?>