The USPS prohibits international shipping of combustible liquids. If a fragrance oil has a flashpoint of 200 degrees or more, it is not considered hazardous and can be shipped internationally.

The new label offers a flat price for 2-3 day flat rate priority shipping. This is a big deal for Poshmark. The USPS has only created custom shipping programs with larger e-commerce companies like ...

Retailers have a couple of options with the service. When preparing an outbound package using Endicia’s returns solution they choose the type of USPS service they want – Priority Mail, Parcel Select, ...