Hi, My customers have reported that 1 server cannot email another server - both are ispconfig 3.05.4p8 and debian jesse I ran ifconfig and have the correct IP info and gateway displayed here, i can ping the other server but email wont connect to it from both ends. I tailed the mail.log and see that the email is "network unreachable", I then log in to ISPCONFIG admin and go to system-server config and see this: IP 127.0.0.1 - netmask 255.255.255.0 - gateway 0.0.0.0 nameserver 126.96.36.199.188.8.131.52. on 1 server and the other is: using a local ip address, which is also wrong. this info was updated months ago but updated in /etc/network/interfaces and not in admin. Is it ok for me to update this info to the correct info, save and reboot????