For Discount Domains Mail you will need to use the follow settings for POP or IMAP setup:

Incoming mail server: email.discountdomains.co.nz or email02.discountdomains.co.nz listed on your mail management page

Incoming Username : Full email address

Incoming Password: ******

Incoming POP3 Port 995 SSL OR Incoming IMAP Port 993 SSL

Outgoing mail server: smtpauth.discountdomains.co.nz

This server requires authentication: Yes

Outgoing Username : Full email address

Outgoing Password: ******

SSL Encryption: No 

Connect to port # 587