How do I say "from where did you send the envelope ?" ?

{nuqDaqvo' nav vaH DangeHpu' ?}

I don't think that's correct.

Or should I write:

{Daqvo' nav vaH DangeHpu'; nuq 'oH Daqvam'e' ?}

You sent the envelope from a location; what's this location ?

or

{Daqvo' nav vaH DangeHpu'; Daqvam yIngu'}

You sent the envelope from a location; identify this location

Perhaps the above are preferable, but can't I express the intended meaning in just one sentence ?

~ bara'qa'