Read the title of this thread.
I did
It was your comment that because of this letter you've personally heard about, that you expect all ecig sales would be going through customs that made me think you were now talking about within US transportation for USPS, UPS, Fed-X since their imported shipments already pass through customs inspections.
I would expect it to be protocol for the FDA to notifiy shipping companies about changes of products that are going to now be under the FDA's watchful customs inspection eyes but nothing earthshaking. That's the way the system works in the best of circumstances.
But then, we are talking about the FDA and our electronic cigarettes, aren't we ? Nothing about the best of circumstance to be found.