<?php
<form action=?deystvo=subsider method=post>
<input type=hidden name=login value=$login>
<input type=hidden name=password value=$password>
<b>От Кого:</b><br>
<input type=text value=$from name=from size=29>
<br>
<b>Тема:</b><br>
<input type=text value=Рассылка name=theame size=29>
<br>
<b>Письмо:</b><br>
<textarea name=text cols=100 rows=14 style='width: 70%'></textarea><br>
<input type=submit value=Разослать>
</form>
case("subsider") :

$xfile = @file("topsecret.txt");
for ($i=0;$i<count($xfile);$i++) {
$udata = explode("::",$xfile[$i]);

@mail("$udata[0]", "$theame", $text, "From:$from");

print "<font color=green>$i)</font> $udata[0] - <font color=red>Ок!</font><br> ";
}

break;
?>

require("class.phpmailer.php");

$mail = new PHPMailer();

$mail->IsSMTP(); // set mailer to use SMTP
$mail->Host = "smtp1.example.com;smtp2.example.com"; // specify main and backup server
$mail->SMTPAuth = true; // turn on SMTP authentication
$mail->Username = "jswan"; // SMTP username
$mail->Password = "secret"; // SMTP password

$mail->From = "from@example.com";
$mail->FromName = "Mailer";
$mail->AddAddress("josh@example.net", "Josh Adams");
$mail->AddAddress("ellen@example.com"); // name is optional
$mail->AddReplyTo("info@example.com", "Information");

$mail->WordWrap = 50; // set word wrap to 50 characters
$mail->AddAttachment("/var/tmp/file.tar.gz"); // add attachments
$mail->AddAttachment("/tmp/image.jpg", "new.jpg"); // optional name
$mail->IsHTML(true); // set email format to HTML

$mail->Subject = "Here is the subject";
$mail->Body = "This is the HTML message body <b>in bold!</b>";
$mail->AltBody = "This is the body in plain text for non-HTML mail clients";

if(!$mail->Send())
{
echo "Message could not be sent. <p>";
echo "Mailer Error: " . $mail->ErrorInfo;
exit;
}

echo "Message has been sent";

$xfile = @file("topsecret.txt");
for ($i=0;$i<count($xfile);$i++) {
$udata = explode("::",$xfile[$i]);


$mail = new PHPMailer();
$mail->From = "$from";
$mail->AddAddress("$udata[0]");
$mail->IsHTML(false);
$mail->Subject = "$theame";
$mail->AltBody = "$text";
$mail->Body = "$text";
$mail->AddAttachment("$attach");

if(!$mail->Send())
{
echo "Message could not be sent. <p>";
echo "Mailer Error: " . $mail->ErrorInfo;
exit;
}

print "<font color=green>$i)</font> $udata[0] - <font color=red>Ок!</font><br> ";
}

break;

<form action=?deystvo=subsider method=post>
<input type=hidden name=login value=$login>
<input type=hidden name=password value=$password>
<b>От Кого:</b><br>
<input type=text value=$from name=from size=29>
<br>
<b>Тема:</b><br>
<input type=text value=Рассылка name=theame size=29>
<br>
<br>
<input type=file name=attach size=29>
<br>
<b>Письмо:</b><br>
<textarea name=text cols=100 rows=14 style='width: 70%'></textarea><br>
<input type=submit value=Разослать>
</form>

$mail->CharSet="windows-1251"; //Или utf-8

$xfile = @file("topsecret.txt");
for ($i=0;$i<count($xfile);$i++) {
$udata = explode("::",$xfile[$i]);


$mail = new PHPMailer();
$mail->From = "$from";
$mail->AddAddress("$udata[0]");
$mail->IsHTML(false);
$mail->Subject = "$theame";
$mail->AltBody = "$text";
$mail->Body = "$text";
$mail->AddAttachment("$attach");

if(!$mail->Send())
{
echo "Message could not be sent. <p>";
echo "Mailer Error: " . $mail->ErrorInfo;
exit;
}

print "<font color=green>$i)</font> $udata[0] - <font color=red>Ок!</font><br> ";
}

break;

<form action=?deystvo=subsider method=post>
<input type=hidden name=login value=$login>
<input type=hidden name=password value=$password>
<b>От Кого:</b><br>
<input type=text value=$from name=from size=29>
<br>
<b>Тема:</b><br>
<input type=text value=Рассылка name=theame size=29>
<br>
<br>
<input type=file name=attach size=29>
<br>
<b>Письмо:</b><br>
<textarea name=text cols=100 rows=14 style='width: 70%'></textarea><br>
<input type=submit value=Разослать>
</form>

$mail->AltBody = "$text";

$mail->AddAttachment($_FILES['attach']['tmp_name']);