Rob,

Did some further research. It LOOKS like most of empeg.com's outbound comes through relay*.mail.uk.psi.net. It also looks like nearly all of those machines are on the ORBS black-list as being open relays (so my mail server, and others around the world, summarily reject mail from them as being 'likely spam').

Is there any way to get the messages resent either (a) through a different mail server or (b) to a different address?