If your ISP uses the ORBS open-relay blocking system, then you will not receive e-mail from Empeg. They use PSI.net in the UK which has a bunch of open relays (well, actually, they accept mail from their customers' open relays, but the end result is the same), and so they're on the list.

I have reconfigured our mail system to not use PSINet's mail relay so this should not be an issue any more.

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Mike Crowe
I may not be speaking on behalf of empeg above :-)