omm, I just want to write a new post like this.
I have ever write a maillist, which sendmail in a loop such as:
for ($i=0;$i<count($emails);$i++) {
mail($emails[$i],$subject,$message);
}
but there are always some emails lost.
I think to convert send it with CC, such as:
mail($email1,$subject,$message,"CC:$email2,$email3,$email..."
but the addressee will see other email addresses.