Posties will be no more in four to six years, as NZ Post announces significant change to their delivery service.

It's confirmed both mail and parcels will eventually be delivered by courier drivers, meaning up to 750 people will lose their jobs in mail delivery, processing and support roles.

Postal Workers Union spokesperson John Maynard says it's clear New Zealand Post hasn't been fighting for new solutions to the changing world.

"We agree there needs to be a different way of going about this, but we think the proposition we put to the company will save them tens of millions of dollars of redundancy pay."

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