I'm a bit peeved at some of the "surprises" that have popped up as part of the coalition. Whilst I don't necesarily fall on the left or right, I have reached my threshold with some of the things that are currently being prioritised, such as making changes to the smoke free plan.
You can find emails of the ministers at the link above, but as the link above will tell you, there is a separate email for the MP themselves. To get that list you have to manually make changes, so to save anyone else some time I've gone ahead and done so for you:
c.luxon@ministers.govt.nz m.anderson@ministers.govt.nz c.bates@ministers.govt.nz a.bayly@ministers.govt.nz d.bidois@ministers.govt.nz c.bishop@ministers.govt.nz c.brewer@ministers.govt.nz s.brown@ministers.govt.nz g.brownlee@ministers.govt.nz m.butterick@ministers.govt.nz h.campbell@ministers.govt.nz c.cheung@ministers.govt.nz j.collins@ministers.govt.nz t.costley@ministers.govt.nz m.doocey@ministers.govt.nz g.fleming@ministers.govt.nz p.garcia@ministers.govt.nz p.goldsmith@ministers.govt.nz n.grigg@ministers.govt.nz r.hamilton@ministers.govt.nz d.kirkpatrick@ministers.govt.nz b.kuriger@ministers.govt.nz m.lee@ministers.govt.nz n.lu@ministers.govt.nz d.macleod@ministers.govt.nz g.mccallum@ministers.govt.nz t.mcclay@ministers.govt.nz j.meager@ministers.govt.nz m.mitchell@ministers.govt.nz j.mooney@ministers.govt.nz r.nakhle@ministers.govt.nz k.nimon@ministers.govt.nz c.penk@ministers.govt.nz t.potaka@ministers.govt.nz m.pugh@ministers.govt.nz s.redmayne@ministers.govt.nz s.reti@ministers.govt.nz t.rutherford@ministers.govt.nz p.simmonds@ministers.govt.nz s.simpson@ministers.govt.nz s.smith@ministers.govt.nz e.stanford@ministers.govt.nz s.uffindell@ministers.govt.nz l.upston@ministers.govt.nz t.vandemolen@ministers.govt.nz s.watts@ministers.govt.nz c.wedd@ministers.govt.nz v.weenink@ministers.govt.nz n.willis@ministers.govt.nz
Fun fact, if you prefer snail mail it's free post.