On Sat, Oct 13, 2007 at 10:10:45PM +0100, Chris G wrote: > But you're asking for "proof that it reached us as the recipient" for > multiple recipients apparently, with a *single* acknowledgement. > That's just not possible in any sort of system. No. You get me wrong, repeatedly. I'm asking for a "proof" that a message has reached a single role. It does not matter if more then one person can actually be the role. Patrick