You've not really given much information about the problem. Has this always happened or just started happening? Has anything changed on your server, is the firewall and/or SElinux enabled (please check your server)? Which RHEL5 is this 5.3 and have you done any updates recently? Please update your
forum profile (do not post the details in this thread) with the output of the following:
Has anything changed on your DNS? What's the output of the following:
Code:
cat /etc/hosts
cat /etc/resolv.conf
dig yourdomain mx
dig yourdomain any
host `hostname` <- type that exactly and use backticks and not single quotes