A documentary show here showed how they detect drug letters in live action. Basically they have all letters in different crates at a sorting center and then let out the sniffing dogs. The letters the dogs mark out go under xray and depending on the amount of substance they start a criminal case on bulk amounts, do background checks and stuff, then make actions based on that information. All the letters they showed were mylar bagged and vacuumed. So my conclusion is that European vendors need to start wiping their packages to get rid of smell from the letters . Pretty ineffective way I'd say to detect letters
They don't sort out the letters depending on countries and there are no risk countries. A decoy doesn't pay literally no role to get the package through, if dog smells something and marks out your letter then the xray will show your stuff on screen no matter how good is the decoy. All needed to get letters through is mylar bag, vacuum, good alcohol wipe and that's literally it. I wouldn't mind getting my stuff in between printer papers if the letter is smell proof, properly mylared and vacuumed. Only exception where decoy probably is needed is pills and rocky stuff
We have to wipe out all dogs, it's the only solution to this madness