my icloud account
bold text Your Case ID: 101551886546 My icloud accout tim.rookley@icloud.com has stopped working. It does not recognise the password. I have spoken to Apple but they say the problem is with Thunderbird as the login and password work fine on iCloud
Wšě wotmołwy (2)
I've just discovered that Apple now need a app-specific password for Thunderbird or similar third party programmes. See https://support.apple.com/en-us/HT204397
Good how you contacted Apple support and they forgot to tell the the relevant part. Another corporate that is just not delivering support.