telnet to port 25 Not route to host
by mfoley from LinuxQuestions.org on (#6GEP6)
I'm trying to send an email to host, but it's not going. I've tried 'telent host 25' and also port 587, but I get connection refused. I can telnet to various other ports on that host without problem. I've stopped the firewall and sendmail is running. /etc/mail/access is empty. According to netstat, sendmail is listening on both ports:
Code:netstat -nlpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 21010/sendmail: acc
tcp 0 0 0.0.0.0:587 0.0.0.0:* LISTEN 21010/sendmail: accHow can it be that sendmail is listening on 25/587, no firewall is running, and yet remote hosts can't connect to these ports?
Code:netstat -nlpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 21010/sendmail: acc
tcp 0 0 0.0.0.0:587 0.0.0.0:* LISTEN 21010/sendmail: accHow can it be that sendmail is listening on 25/587, no firewall is running, and yet remote hosts can't connect to these ports?