My reading of their settings page suggests this combination: outgoing SMTP server: mail.orcon.net.nz

My reading of their settings page suggests this combination:

outgoing SMTP server: mail.orcon.net.nz port: 587 Connection security: SSL/TLS Authentication: normal password User name: part of your address before the @

or

outgoing SMTP server: mail.orcon.net.nz port: 465 Connection security: STARTTLS Authentication: normal password User name: part of your address before the @

Most mail services use STARTTLS security on port 587 and SSL/TLS on port 465, but maybe Orcon is different. Also, if they require just the part of your address before the @, entering the full address for the user name may cause sending to fail.