Why did you wait 7 days to ask the question?
If they didn't post that they received a bomb out of the blue, you could've emailed (or pinged) them to ensure they got it.
To all the noobs, this is why DC's are used.
Unless you want to go to the hassle that MT is going to have to do now, if you send someone a bomb, and they don't post that they got it, ASK them if they received it...
The same goes for packages that YOU receive. Let the bomber know you got it.
Good advice Doug. I agree, bomb his azz again... :)