The Frozen North said:I never got the impression that Harry's protection at the Dursley's had anything to to with the protection that Lily's sacrifice gave him. DD said that in sending Harry to his aunt he was invocing a very old magic but regarding Lily's protection for Harry, DD said that it was completely unexpected and that his understanding of what happened was his own conclusions, it was never stated as absolute wizarding fact.
The protection was from his mother's blood, because Voldemort couldn't touch Harry, but he couldn't touch Harry anywhere he was. Quirrell couldn't touch Harry when possessed by Voldemort because he got burned. Voldemort couldn't touch Harry at the Dursley's or at Hogwarts until Wormtail used Harry's blood for his rebirth. So I'd say that all goes back to Lily's sacrifice and Dumbledore's protection charm combined, but it only had to do with Voldemort.
If I remember right, Lucius touched Harry in Diagon Alley and Wormtail touched Harry in PoA and HBP so I'd have to say that the protection Harry had from Voldemort does not extend to the Death Eaters.