ahmedsa
means your email queue is corrupted.. search here in the forums and with google..
Charlie already advised you a likely solution re this issue, see
the other thread ie this post
http://forums.contribs.org/index.php/topic,51529.msg262231.html#msg262231Please read it all carefully & do what he says & report the outcome here
ie these instructions (adjust to suit)
You can probably make those messages go away by doing:
sv stop /service/qmail
cd /var/qmail/queue
rm */1/4573942 */20/4576353 */10/4572893 */11/4575010
sv start /service/qmail
[/quote]check your hard drive
[/quote]
Google UBCD Ultimate Boot CD
Download the iso & make yourself a bootable CD (or USB).
Boot up your server using the UBCD & run your disk manufacturers disk test routines (long tests).
You can also use this Howto
http://wiki.contribs.org/Monitor_Disk_Health