"The Australian community's use of letters [is] now in terminal and structural decline."
Australia Post made a A$222 million loss after tax for 2014/15, compared to a A$116.2 million profit a year ago.
Letter volumes fell 7.3 per cent, compared to a 4 per cent fall the year before.
"As a result of significant investment and focus over the past five years in e-commerce, our revenue from parcels has grown 136 per cent," Fahour said.
"The pure letters business is today closer to 28 per cent of revenue.
"We are a parcel company more than we are a letters company."
For the first time in the group's 206-year history, parcels have made up more than half of total revenue of A$6.4 billion, rising 3.6 per cent to A$3.2 billion.
Fahour said this was achieved despite intense competition from international operators, and from more smaller players and the emergence of new delivery and collection models.
He did not comment on potential job cuts despite the business setting aside funds for an expected 1900 job losses.
Australia Post
•Full-year loss of A$222 million, compared to A$116.2 million profit a year ago.
•Total revenue flat at A$6.4 billion.
•No dividend will be paid to the Australian government.
- AAP