You need to call the AddAddress
method once for every recipient. Like so:
$mail->AddAddress('person1@domain.example', 'Person One');
$mail->AddAddress('person2@domain.example', 'Person Two');
// ..
Better yet, add them as Carbon Copy recipients.
$mail->AddCC('person1@domain.example', 'Person One');
$mail->AddCC('person2@domain.example', 'Person Two');
// ..
To make things easy, you should loop through an array to do this.
$recipients = array(
'person1@domain.example' => 'Person One',
'person2@domain.example' => 'Person Two',
// ..
);
foreach($recipients as $email => $name)
{
$mail->AddCC($email, $name);
}