nmap -A --open -p 25 192.168.x.0/24 -oG - | grep 25/open | grep qpsmtpd | awk '{ print $2}'
Code: [Select]nmap -A --open -p 25 192.168.x.0/24 -oG - | grep 25/open | grep qpsmtpd | awk '{ print $2}'far from bullet proof, but it may help to find it on the network.