i have a dedicated server with godaddy turbopanel and for some reason my email is not working now. i don tknow how to solve this error, please someone help me find a solution to this problem

my linux server has posfix fetchmail and sendmail. i reisntall postfix but that doesnt work, infact i think that made it just worst cuz now i can't even see i on the panel.

i found this error in /var/log/maillog on my red hat fedora core 7 linux server. i really dont want to reinstall the operating system (kernel) but if i dont find a solution soon, i think i will have to re-install linux on that machine. i hate doing that cuz that means down time and i will certainly loos money