Apple iCloud setup for Thunderbird

Mail server settings

Refer to your email app's documentation for information about how to use these settings. iCloud Mail uses the IMAP and SMTP standards supported by most modern email apps. iCloud does not support POP.

IMAP information for the incoming mail server

• Server name: imap.mail.me.com
• SSL Required: Yes
  If you receive errors when using SSL, try using TLS instead.
• Port: 993
• Username: The name part of your iCloud email address (for example, emilyparker, not emilyparker@icloud.com)
• Password: Your iCloud password

SMTP information for the outgoing mail server

• Server name: smtp.mail.me.com
• SSL Required: Yes
  If you receive errors when using SSL, try using TLS or STARTTLS instead.
• Port: 587
• SMTP Authentication Required: Yes
• Username: Your full iCloud email address (for example, emilyparker@icloud.com, not emilyparker)
• Password: Your iCloud password

Ref: http://support.apple.com/kb/ht4864?viewlocale=fr_fr