Mail to multiple recipients not working

[bridawg]

Hey all, So I can't mail to multiple people for some reason. Here's my code, I need it to potentially accept two email addresses if necessary,

$from_address="[e-mail]";

$reply_name=$from_name;
$reply_address=$from_address;
$reply_address=$from_address;
$error_delivery_name=$from_name;
$error_delivery_address=$from_address;

//may be one, or two emails, if only 1 email address it works 🙁

$to_address="[e-mail], [email][e-mail][/email]";

$subject="Quotation";
$email_message=new email_message_class;
$email_message->SetEncodedEmailHeader("To",$to_address);
$email_message->SetEncodedEmailHeader("From",$from_address);
$email_message->SetEncodedEmailHeader("Reply-To",$reply_address,$reply_name);
$email_message->SetHeader("Sender",$from_address);