Forwarded emails not forwarding (Plesk)
I came across an issue with a customer not being able to forward emails for root@hostname and postmaster@hostname, even after setting it up in Plesk and also trying it manually via the command line.
One of the errors showing in qmails error logs was the following:
I found that the following files were blank:
After adding an email address to these, emails forwarded without issue.
# cat /var/qmail/alias/.qmail-root email@example.com