从数据库获取列表电子邮件列表，并从PHP脚本发送邮件，而不使用任何API

 $sql = "select emailid from table where category = 1";
    while($row=mysql_fetch_array($sql))
    {
            $email=$row['emailid'];
            $to = $email;

            $subject = "E-mail subject";
            $body = "E-mail body";
            $headers = 'From: info@mydomain.com' . "
" ;
            $headers .= 'Reply-To: info@mydomain.com' . "
";
            mail($to, $subject, $body, $headers);
    }

Suppose the above code will fetch 100 e-mail ids from database and send the mail one by one to each e-mail id. but what i want to do is.... fetch all e-mail ids in an array and send them as 'BCC' to each e-mail at once. one more thing i want to customize the e-mail body content for each id....

Any ideas?

What you want to do is impossible. If you send them at once via multiple addresses in To/CC/BCC, everyone gets exactly the same email. So you cannot customize the bodies.

If sending the same email to everyone is fine, try this:

$sql = mysql_query("select emailid from table where category = 1");
$recipients = array();
while($row = mysql_fetch_array($sql)) {
    $recipients[] = $row['emailid'];
}

$to = 'info@mydomain.com';
$subject = "E-mail subject";
$body = "E-mail body";
$headers = 'From: info@mydomain.com' . "
" ;
$headers .= 'Reply-To: info@mydomain.com' . "
";
$headers .= 'BCC: ' . implode(', ', $recipients) . "
";

mail($to, $subject, $body, $headers);