Forwarder keeps a copy on the server. Then it's NOT a forwarder.
EMAIL FORWARDER: cpanel calls it email forward, but it leaves a copy on the server. this is duplicating all my emails in outlook and the iPhone. The way you guys have it setup, others call it " send a copy to: " - forward is to pass on the email. not keep a copy. please fix this, it's very unuseful the way it is now. When you move, you ask the US mail to forward your mail to the new address. do they leave a copy of all letters in your old house?