My Dad worked for the USPS for 30+ yrs and I worked there P/t to get me thru college. Let me tell ya! You better pack e cig stuff good. Those machines do not discriminate. They are designed to kick out stuff in an envelope that is too thick but some stuff does get through. I used to run that particular machine and you would be surprised at what people send in a regular envelope!!!! Class Rings, Condoms, 20 Polaroids of a naked wife for her hubby in the military! etc etc Please use the small bubble wrap packages to mail attys and such! It's not much more IF ANY to mail stuff in these. Those packages are hand sorted and never see a machine.