php实现的抄送与密送电子邮件的代码，如下：
<HTML>
<HEAD>
<TITLE>发送邮件 with CC and BCC-www.jb200.com</TITLE>
</HEAD>
<BODY>
<FORM action="sendemailWithCC_BCC.php" method=post name=form1>
<TABLE>
<TBODY>
<TR>
<TD>
<DIV align=right><b>To</b></DIV></TD>
<TD>
<p>Name <INPUT name=mailtoname size=35><BR>E-mail
<INPUT name=mailtomail size=35></p></TD></TR>
<TR>
<TD>
<DIV align=right><b>CC</b></DIV></TD>
<TD><INPUT name=mailcc size=35> </TD></TR>
<TR>
<TD>
<DIV align=right><b>BCC</b></DIV></TD>
<TD><INPUT name=mailbcc size=35> </TD></TR>
<TR>
<TD>
<DIV align=right><b>Priority</b></DIV></TD>
<TD><SELECT name=mailpriority>
<OPTION value=1>Highest</OPTION>
<OPTION value=2>High</OPTION>
<OPTION selected value=3>Normal</OPTION>
<OPTION value=4>Low</OPTION>
<OPTION value=5>Lowest</OPTION>
</SELECT>
</TD></TR>
<TR>
<TD><DIV align=right><b>邮件主题：</b></DIV></TD>
<TD><INPUT name=mailsubject size=35></TD></TR>
<TR>
<TD>
<DIV align=right><b>邮件内容：</b> </DIV></TD>
<TD><TEXTAREA cols=50 name=mailbody rows=7></TEXTAREA> </TD></TR>
<TR>
<TD colSpan=2>
<DIV align=center><INPUT name=Submit type=submit value="提交"></DIV>
</TD>
</TR>
</TBODY>
</TABLE>
</FORM>
</BODY>
</HTML>
<!-- sendemailWithCC_BCC.php
<html>
<head>
<title>发送电子邮件-www.jb200.com</title>
</head>
<body>
<?php
$message= " " ;
if (empty ( $mailtoname) || empty ( $mailtomail) ) {
die ( "收件人不能为空 ") ;
}else{
$to = $mailtoname . " <" . $mailtomail . ">" ;
}
if ( empty ( $mailsubject) ) {
$mailsubject=" ";
}
if (($mailpriority>0) && ($mailpriority<6)) {
$mailheader = "X-Priority: ". $mailpriority ."n";
}
$mailheader.= "From: " . "Sales Team <sales@yourdomain.com>n";
$mailheader.= "X-Sender: " . "support@yourdomain.comn";
$mailheader.= "Return-Path: " . "support@yourdomain.comn";
if (!empty($mailcc)) {
$mailheader.= "Cc: " . $mailcc ."n";
}
if (!empty($mailbcc)) {
$mailheader.= "Bcc: " . $mailbcc ."n";
}
if (empty($mailbody)) {
$mailbody=" ";
}
$result = mail ($to, $mailsubject, $mailbody, $mailheader);
echo "<center><b>Mail sent to ". "$to". "<br>";
echo $mailsubject. "<br>";
echo $mailbody. "<br>";
echo $mailheader. "<br>";
if ($result) {
echo "<p><b>邮件发送成功！</b></p>";
}else{
echo "<p><b>邮件未能完成投递！ </b></p>";
}
?>
<div align="center">
<table><tr><td width="66"><div align="right"><b>To</b></div></td>
<td width="308"><b><?php echo $mailtoname . " [". $mailtomail . " ]";?></b></td></tr>
<tr><td width="66"><div align="right"><b>CC</b></div></td>
<td width="308"><b><?php echo $mailcc;?></b></td></tr>
<tr><td width="66"><div align="right"><b>BCC</b></div></td>
<td width="308"><b><?php echo $mailbcc; ?></b></td></tr>
<tr><td width="66"><div align="right"><b>Priority</b></div></td>
<td width="308"><b><?php echo $mailpriority;?></b></td></tr>
<tr><td width="66"><div align="right"><b>Subject </b></div></td>
<td width="308"><b><?php echo $mailsubject;?></b></td></tr>
<tr><td width="66"><div align="right"><b>Message</b></div></td>
<td width="308"><b><?php echo $mailbody;?></b></td></tr>
</table>
</div>
</body>
</html>
-->