[Exim] input/output error ?

Hi

what does that mean :

1999-08-09 20:53:40 11DyIU-00002v-00 == /var/spool/mail/c/0/00/inbox <c000@???> T=address_file defer (5): Input/output error: error while writing to /var/spool/mail/c/0/00/inbox

Lauren Luyckx