I'm trying to send email using mutt.
Once the email is ready, as I sent it, I received following message like:

cannot move file: /usr/sbin/spool/temp/1273607725000.2644.e3851.mail

User is a normal. System is new one based on Debian so maybe some configurations are missing, user right on /usr/sbin/spool/ ..etc.. ?

Thanks for attention and any help.

note : this thread was previously wrongly posted in the server group.