" ChrisF" <chrisf@gmail_.com> wrote in message news:email@example.com
> Can interstate parcel mail be inspected by authorities the same way as
> what happens with international mail?
International mail may be checked for compliance with federal customs laws,
quarantine laws, etc. Those laws don't apply to interstate mail. Indeed,
rather than interstate mail, it is essentially just domestic Australian
mail. Other laws apply equally to both international and domestic mail.
But your query is short on context. What is your specific concern?