How to Set Up .mac Email
To set up your email account on macOS or Windows, first download and install the Postbox desktop email app. Next, from the File menu select New > Mail Account, then enter the email settings outlined below.
.mac Settings for iCloud
Incoming Server – IMAP
Server: imap.mail.me.com
Port: 993
Security: SSL/TLS
Username: Your username (not email)
Password: Your password
Outgoing Server – SMTP
Server: smtp.mail.me.com
Port: 587
Security: STARTTLS
Username: Your username (not email)
Password: Your password