Hi, i have a CentOS 4.4 running sendmail, with two network interfaces (eth0 -> Internet , and eth1 Local Network), from the terminal (SSH) i do telnet 127.0.0.1 25 and it connects to sendmail (i think so), but from another server (external, and so from the same SSH terminal) i try to connect to the Internet IP telnet 146.77.220.236 25 Trying 146.77.220.236... telnet: connect to address 164.77.228.236: Connection refused telnet: Unable to connect to remote host: Connection refused so i was thinking "it could be the fu...ing IPTABLES" from terminal execute iptables -L| grep smtp and the result is: ACCEPT tcp -- anywhere anywhere tcp dpt:smtp so , if the sendmail service is up, what could be happen??