[arch-general] strange access permissions in /var/spool/mail

Hello, while testing dma (Mail Transfer Agent from DragonflyBSD) on Arch Linux I stumbled on this: [mickraus@gandalf mickraus]\$ ls -la /var/spool/mail insgesamt 12 drwxrwxrwt 2 root root 4096 16. Mai 15:11 . drwxr-xr-x 5 root root 4096 16. Mai 15:26 .. ---------- 1 mickraus users 201 16. Mai 15:11 mickraus Is it normal that a user has no access to his own mail box? I looked into postfix.install but it doesn't correct the file mode either. So what is the trick? Kind Regards, Michael Krauss