Forward from a list to another list

RouterOS Beginner Basics
1

Hello,

I have a SIP provider who has 8 servers. Then I created an addres-list called SIP_Provider
I have three phones (one ip phone and two softphones) on my lan 192.168.1.0. Then I created an address-list called Phones

I want to forward the voip traffic (sip+rtp) from SIP_Provider to Phones

In the Ip-Fiewall-nat window, I created a new rule:
chain:dstnat
proto:6
dst-port:5060
in.interface:ether1
Advanced tab:
dst. address list: SIP_Provider
Action tab:
dst-nat
to addresses: *** cannot enter an address list !!! ***

First of all, is it correct to want to do that ?
Why we cannot an address list as “to addresses” ?
Thank you ba advance

2

in tabe “Advanced” you can add src and dst address lists

3

If I do that I have an error because the field “to addresses” must not be empty.
And if I enter the name of an address list in the field “to addresses” then it’s refused.