Thank you for your reply.
I also did those steps.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_webmailserver02-lv_root
50G 47G 0 100% /
tmpfs 1,9G 24K 1,9G 1% /dev/shm
/dev/sda1 477M 94M 358M 21% /boot
/dev/mapper/vg_webmailserver02-lv_home
685G 41G 610G 7% /home
not using too much diskspace and the other stept i did.