[Exim] errors_address and $domain expansion not working

Hi,

In a multidomain configuration, I'd like to use expansion in variable
errors_address like this

        errors_address = postmaster@${expand:$domain}
        errors_copy = postmaster@* postmaster@masterdomain

in order to address the error first to the postmaster of the domain involved
and then,
thanks to errors_copy, makes a copy to general postmaster.


But it didn't work at all (make an error in mainlog).

$domain is not an expandable variable when used in errors_address ?

I also tried postmaster@$domain before
                                but it was worst.

Is this a mistake from my own or this variable $domain doesn't support any
expansion in this case ?

db