"This is a truly historic development for Australia Post," Senator Stephen Conroy, Minister for Broadband, Communications and the Digital Economy, said in a statement.

"It is embracing the emerging digital economy and taking advantage of the possibilities offered by the rollout of super-fast broadband through the National Broadband Network (NBN)."

The Department of Human Services and the Australian Taxation Office are currently taking part in trials of the mailbox as a communication tool.

However, it has not been smooth sailing for the launch of Australia Post's Digital Mailbox. In August this year, the brought by Australia Post against joint venture Digital Post Australia (DPA), alleging that DPA's name was too similar to its own.

The court found the suit was without merit, with Australia Post and DPA stating it was on track to deliver a digital postal service.