The changes to standard mail delivery would be rolled out in cities and larger towns - including Rotorua - from July with the reductions being introduced to smaller centres over the next two years.
Rotorua Chamber of Commerce chief executive Darrin Walsh said he didn't think it would have a huge impact.
He said more and more businesses were using email these days and he believed if anything it would encourage more businesses to look at electronic options, which could also prove cheaper.
"I don't think we get swift mail delivery here anyway. In all honesty, I don't think it will impact too much on businesses."
NZ Post's mail and communications chief operating officer Ashley Smout said the change would cost 400 posties their jobs nationwide.
"Our target of 95 per cent of standard mail delivered within three working days remains, just as it is now. Six-day-a-week deliveries will continue for priority mail and courier parcels."
Alternate delivery days will be tested in parts of Auckland, centred around Ellerslie, to fine-tune the changes before July. Priority mail including FastPost will continue to have a next day delivery target between major towns and cities. Rural deliveries remain largely unchanged.
The Postal Workers Union advocate Graeme Clarke described the changes as a "money grab" by the Government.
He said such a reduction of the mail delivery service was "encouraging privatisation".
Mr Clarke said priority mail would continue to to be delivered six days a week in major towns and cities at double the standard rate.
- Additional reporting: NZME.
