Cannot send mail via iCloud

Hello everyone,

since the iOS 14 update I cannot send emails via the mail app on all my devices.

The error is always “Incorrect username and password for iCloud”

I have changed my appleid password few times but it doesn’t help. As soon as I go on iCloud.com the I can send emails via the web and this is the only way for the last months. Really annoying!

Any suggestions?

regards