Updating a voicemail number's termination email address can be done via the Web Dashboard.
- Log into the Web Dashboard at https://www.tnz.co.nz/
- Select Service Settings | Voice Numbers from the menu
- Click on the voicemail number you would like to update
- Click the Edit/Modify button
- Select the Inbound Mode tab
- Adjust Email Address field to match the new email address
- Click the Update button
- Repeat these steps for other voicemail numbers that require updating
This change takes effect immediately.