To add a .mac mail account to a P990i.
With the flap open:
First - get to the correct configuration:
Now - fill out
Basic Tab
Account Name: mac
Your Name: Your full name
Email Address: Your .mac email address
Connection Type: IMAP
Inbox Tab
Incoming Server Address: mail.mac.com
Username: Your .mac account name
Password: Your .mac account password
Outbox Tab
Outgoing server address: smtp.mac.com
Use SMTP auth: checked
Use Inbox login details: checked
Now - we need SMTP to be secure. Take the E-Mail account menu > Advanced option (menu at the top of the screen)
Outgoing tab
Secure Connection: TLS
Outgoing port: 25
Finally Save, Save and then Done.
Now .mac mail should be available in your messages app.