Vodafone is shutting down a quarter of a million email accounts due to technical problems, specifically due to high rates of spam and delayed mail.
The telecommunications company believes this change will mostly affect older people, having launched many of the addresses in the 1990s.
This change is set to affect between 200,000 and 250,000 customers, with popular accounts such as Paradise and iHug closing down on November 30.
Just one of those customers affected is Elsa Olla, a woman in her 80s from Whangarei and avid user of iHug.
Ms Olla told Newshub she was "horrified" to learn her only email address is being shut down.
As National Secretary of the Heritage Rose Society, Ms Olla is the recipient of at least 20 emails a day.
The iHug user is "very daunted" at the prospect of trying to change everything over.
The email service has encouraged users to opt for Microsoft or Google instead, offering a forwarding service and advice on how to set up a new account.
Newshub's created a handy step-by-step guide to help those like Elsa get things back on track.
Visit vodafone.co.nz/email for more tips and tricks to make the move even easier.