I've tried and tried but still can't get Opera to connect to my icloud.com I'd include a screen shot of the settings but I don't see a way to attached a screen shot here so here's what I have.
Incoming: imap.mail.me.com
Port: 993
Secure Connection: TLS active
Authentication: Auto
Outgoing: smtp.mail.me.com
Port: 465
Secure Connection: TLS active
Authentication: Auto
Version 1.0
Build 1040
Platform Mac OS X
System 10.10.2