whenever i login to my system i get a message , you have a mail.when i type mail, am getting a lot of mails. After reading those how can i delete them.

Mail version 8.1 6/6/93. Type ? for help.
"/var/spool/mail/root": 34 messages 34 new
>N 1 root@localhost.local Sat Mar 24 13:36 29/1134 "SMART error (CurrentPendingSector) det"
N 2 root@localhost.local Sat Mar 24 14:56 29/1134 "SMART error (CurrentPendingSector) det"
N 3 root@localhost.local Sat Mar 24 15:26 29/1134 "SMART error (CurrentPendingSector) det"
N 4 root@localhost.local Sat Mar 24 16:37 29/1134 "SMART error (CurrentPendingSector) det"
N 5 root@localhost.local Sat Mar 24 17:09 29/1134 "SMART error (CurrentPendingSector) det"
N 6 root@localhost.local Sat Mar 24 18:15 29/1134 "SMART error (CurrentPendingSector) det"
N 7 root@localhost.local Sun Mar 25 10:58 29/1134 "SMART error (CurrentPendingSector) det"

After you view the message press d to delete it, when finished viewing them all, press q to quit. Alternatively, you can press d 1 to delete the first message, and so forth, then press q. If you press x to exit mail the marked deleted mails will remain.

http://www.linuxmanpages.com/man1/mail.1.php