postfix not response port 25 by telnet

Discussion in 'Server Operation' started by mircopoint, Mar 27, 2017.

  1. mircopoint

    mircopoint New Member

    I followed for 2 times the tutorial for Ubuntu 16.04 server perfect, but every time I postfix does not work, when I try to telnet to port 25 I get no response, while about 110 Dovecot ok ... how can I fix this?o_O
     
  2. netstat -tanpu |grep :25
     
  3. ahrasis

    ahrasis Active Member

    Are you connecting behind a router or directly to the internet? Is your port 25 opened/forwarded?
     
  4. mircopoint

    mircopoint New Member

    ----------------------------
    root@serweb2:/home/adminc# netstat -tanpu |grep :25
    tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 1158/master
    tcp6 0 0 :::25 :::* LISTEN 1158/master
     
  5. mircopoint

    mircopoint New Member

    From the local network:confused:
     
  6. till

    till Super Moderator Staff Member ISPConfig Developer

    The netstat output is fine. Please post the output of:

    iptables -L
     
  7. mircopoint

    mircopoint New Member

    ----------------
    root@serweb2:/home/adminc# iptables -L
    Chain INPUT (policy ACCEPT)
    target prot opt source destination
    fail2ban-postfix-sasl tcp -- anywhere anywhere multiport dports smtp
    fail2ban-dovecot-pop3imap tcp -- anywhere anywhere multiport dports pop3,pop3s,imap2,imaps
    fail2ban-pureftpd tcp -- anywhere anywhere multiport dports ftp
    fail2ban-ssh tcp -- anywhere anywhere multiport dports ssh

    Chain FORWARD (policy ACCEPT)
    target prot opt source destination

    Chain OUTPUT (policy ACCEPT)
    target prot opt source destination

    Chain fail2ban-dovecot-pop3imap (1 references)
    target prot opt source destination
    RETURN all -- anywhere anywhere

    Chain fail2ban-postfix-sasl (1 references)
    target prot opt source destination
    RETURN all -- anywhere anywhere

    Chain fail2ban-pureftpd (1 references)
    target prot opt source destination
    RETURN all -- anywhere anywhere

    Chain fail2ban-ssh (1 references)
    target prot opt source destination
    RETURN all -- anywhere anywhere
    root@serweb2:/home/adminc#
     
  8. telnet localhost 25 working fine ?
     
  9. MaxT

    MaxT Member HowtoForge Supporter

    check option

    -o smtpd_sasl_auth_enable=no

    inside /etc/postfix/master.cf file
     

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