The file contains a username that is not the current user

id:content-username-off

We can only support full mailaddresses as forwards in the standard mail system. A username in a qmail file will forward mails to username@host.uberspace.de but only on the same host. We would replace this with the default mailaddress username@uber.space.

But this error indicates, that the username in the file does not fit to the current user, since this is probably a mistake you need to check this yourself and set a full mailaddress as forward or any other configuration for this mailaddress.

Error

Error: This configuration is probably not working as expected in the standard mail system. This is why you should recreate this mailaddress yourself using the uberspace mail commands.