My web and mail sever was setup last year and working properly until recently. I have noticed the following error in the mail log:
1. Courierpop3login:authentication error: input/output error
2. freshclam: getpetch: cant download daily-7199cdiff from database.clamav.net
3. sshd: invalid user guest for user root
4. postfix/smtpd:lost connection after CONNECT from localhost[127.0.0.1]
5. postfix/local: warning
ipe-command-read: read time limit exceeded
6. high mem -empty, lowmem reserve low, swap pages,...
Can you please help me? I dont know where to start?