Ok, i got the point.
The clearopensmtp executable is owned by vpopmail, correctly but i don't
know why, when i run it the /home/vpopmail/etc/tcp.smtp.cdb is chowned to
I had clearopensmtp in the crontab for root, as INSTALL suggested.
I modified the entry the crontab entry to su vpopmail -c
"/home/vpopmail/bin/clearopensmtp" 2>& and now the file keep correct
permissions and everything work fine.
I still have the problem if i launch it from console.
Well..i don't know.
But at least is working now :)