The Commerce Commission undertook a preliminary investigation into the issue but decided not to take it further.
"On the basis of the information available to us, we currently consider that there is unlikely to be significant harm to consumers from NZ Post's pricing," a Commerce Commission spokesperson said.
Freightways, which this week reported revenue up 1 per cent to $318.9 million in the six months to Dec. 31 from a year earlier, reiterated the level of discounting "has had an adverse effect on earnings in the DX Mail Division."
Chief executive Mark Troughear told BusinessDesk the commission determined that the targeted discounted zonal pricing didn't have an adverse impact on consumers in the short term. However, longer term it "completely ignored" the fact that if you end up with only one provider then you have no competition.
Troughear said he planned to go back to the competition regulator "very shortly," claiming NZ Post is now offering additional rebates.
If that doesn't pan out, "we have a number of other options," he said.
"We will consider litigation, but we will also carry on competing hard with New Zealand Post," he said.