Your email username is your full email address. I.e: if your email name or alias is myalias and your domain name is mydomain.co.za, use:
myalias@mydomain.co.za
Your email account password is the password supplied to you by our IT team.
Use mail.mydomain.co.za for both incoming and outgoing email servers
No encryption like SSL or TLS necessary to select. Select None as option.
Outgoing (SMTP) port: 587
Incoming port for IMAP: 143
or
Incoming port for POP3: 110
Place a checkmark in the box under "Use same settings as incoming for authentication on outgoing mail."