We have put a lot of time into making sure our method of packaging is as good as possible for sending live plants through the post. There are handling notifications on the carton to Australia Post workers which we hope they adhere to. Unfortunately, once the plants are out of our hands, we can't control how they are treated.
We also send on a Monday or Tuesday of any given week to try and ensure that plants are received by the end of the week and they aren't left in post offices over the weekend. Due to some longer transit times, sometimes this is unavoidable and we try and make extra allowances for this when packing them.
The best thing that you can do to minimise plant damage is make sure you pick up your plants from your Australia Post post office as soon as you receive a registered post notice in your mailbox. This minimises the chance of the plants drying out.