[exim] Grabbing the email address in a filter variable

All,

In a filter specification, I am aware that of the behaviour of the
$reply_address variable.

However, I have noticed that it contains the full value of the header
variable, e.g. it could contain:

    Paul Jolly <paul@???>

Is there a variable that contains only the email address, e.g. paul@???
, according to the same precedence rules as $reply_address?

Many thanks,


Paul