Postfix alias problem

[Colin Law]

On 24 November 2015 at 10:48, David Fletcher <dave at thefletchers.net> wrote:
> ...
> Obviously you can't add an Internet domain name to mydestination, or
> edit an MX record, unless you have your own domain name. I consider
> myself very lucky indeed to have managed to get the domain name I use
> for my email.

<mydomain>.org.uk *is* my personal domain name.  I just want to
forward the system mail to my gmail address.  My actual email server
is a different machine on the same domain.
Thanks

Colin