mh1:~ # ls -al /vmail/
 lrwxrwxrwx  vmail vmail  28 31. Dez 2016  gibs.net -> /data/btrfs/mail/gibs.net/
 mh1:~ # ls -al /archive/vmail/
 lrwxrwxrwx  vmail vmail  28 31. Dez 2016  gibs.net -> /data/btrfs/arch/gibs.net/