i just downloaded Thunderbird from Mozilla because it's the only program I can use to access my hosting email addresses in a easy way, but when I try to add my iCloud account, I get an error.
Here's how I'm trying to configure it (sorry for the Spanish).
These settings work for me.
Incoming
Outgoing
Username for both should just be your actual username "karlo_lopez", not your whole email address.
VERY IMPORTANT NOTE: If your iCloud account is setup to 2 layer identification, then you need to setup an app-specific password within your Apple ID account. Enter that password instead of your normal iCloud password when setting up the email address into Thunderbird.
