The sysmail config file for username@uber.space contains a vdeliver code pipe

id:config-is-sysmail-and-content-vdeliver

This error indicates that the system mail configuration file ~/.qmail contains a redirect code to the mail system (with |/usr/bin/vdeliver). This does not work all incoming mails to username@uber.space are bounced back to the sender.

In the standard mail system it is not possible to disable the system mail address username@uber.space for technical reasons. You should remove the file ~/.qmail so mails are just stored into the system mailbox.

Error

Fatal Error: This configuration is not working with the standard mail system and we are not able to migrate it. You need to fix it or find a workaround using the uberspace mail commands.