I've found a lot of lock files (not by the name username.lock) under /var/spool/mail They are named like: username.lock.1001301842.37546.hostname
Now though they are 0 size, i wonder if their left over will affect users doing their popper session? Why do they exist and can i delete them at anytime (if not when could i kill them ?) We run qpopper 4.0.3
