AW: One address with more recipients

[G+M Dorn (Gregor Adamczyk)]

Thank you all

Seems:
>if you want to add external users to a mailing list, i'm afraid, you have to create an account (eg ext at example.com) of type 'Mail Forwarding' 
>and add the external recipients under configuration -> 'Forward Mail To'. you can then send mail to ext at example.org and it will be distributed to the external recipients you added. also it seems to be possible to reference the >ext at example.org in an arbitrary distribution list.

is ideal for it...

With best regards
Greg