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When I try to block this, it doesn't let me. It shows up as "Null" when I hover over the from, but you can clearly see a name in the "From Section" - Looking at the headers you can see there is a space in the email address - Which is most likely causing smartermail to flake out.
If I check this email along with say 10 other spam emails to block at one time, It won't block any of them - because this one causes the issue. When I deselect this one, then I can block the other 9.