[exim] How smart is ${domain:string}

If I used: ${domain:$h_from} where From was "Marc Perkel
<marc@???>" - will it work? Or do I need to do something more
complex? I want to get the domain out of the From: header.

--
Marc Perkel - marc@???

Spam Filter: http://www.junkemailfilter.com
    My Blog: http://marc.perkel.com