trouble with postfix install (timing out from client)

Discussion in 'Installation/Configuration' started by BobSD, Jan 10, 2013.

  1. BobSD

    BobSD New Member

    I have just outfitted a basic server (Ubuntu 12.04 LTS /Precise Pangolin) and have installed Postfix and Dovecot, based on the Ubuntu manuals.

    https://help.ubuntu.com/community/Dovecot
    https://help.ubuntu.com/community/Postfix

    Postfix gets mail out of the box to my gmail account, e.g.:

    Code:
    sendmail [redacted]@gmail.com < /etc/motd
    Testing remote access with the open source client for Eudora, I can successfully download email, so Dovecot/POP3 seems to be functioning.

    However, I cannot seem to get Eudora to successfully get mail from the client to the box or beyond. Depending on the security/port config I use, it generally times out.

    I seem to be able to get access via the local terminal, and remote shells, such as:

    Code:
    $ telnet lists.teachers.net 25
    Trying 50.56.184.186...
    Connected to lists.teachers.net.
    Escape character is '^]'.
    220 lists.teachers.net ESMTP Postfix (Ubuntu)
    ehlo lists.teachers.net
    250-lists.teachers.net
    250-PIPELINING
    250-SIZE 10240000
    250-VRFY
    250-ETRN
    250-STARTTLS
    250-AUTH PLAIN LOGIN
    250-AUTH=PLAIN LOGIN
    250-ENHANCEDSTATUSCODES
    250-8BITMIME
    250 DSN
    quit
    221 2.0.0 Bye
    Connection closed by foreign host.
    
    When Eudora tries to connect, i don't see any activity in the /var/log/mail/log or /var/log/mail.err , which I guess means those aren't the relevant logs or there is no activity to report.

    I tried setting Eudora to use STARTTLS, SSL/TLS, and none, but they all time out. How would I go about troubleshooting this? I haven't set up any firewall rules:

    Code:
    $ sudo iptables -L
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Code:
    $ sudo netstat -tap
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
    tcp        0      0 *:submission            *:*                     LISTEN      4112/master
    tcp        0      0 *:pop3                  *:*                     LISTEN      3210/dovecot
    tcp        0      0 *:imap2                 *:*                     LISTEN      3210/dovecot
    tcp        0      0 *:ssh                   *:*                     LISTEN      564/sshd
    tcp        0      0 *:smtp                  *:*                     LISTEN      4112/master
    tcp        0      0 *:imaps                 *:*                     LISTEN      3210/dovecot
    tcp        0      0 *:pop3s                 *:*                     LISTEN      3210/dovecot
    tcp        0    300 lists.teachers.net:ssh  99-95-169-159.lig:55464 ESTABLISHED 1433/sshd: listman
    tcp6       0      0 [::]:submission         [::]:*                  LISTEN      4112/master
    tcp6       0      0 [::]:pop3               [::]:*                  LISTEN      3210/dovecot
    tcp6       0      0 [::]:imap2              [::]:*                  LISTEN      3210/dovecot
    tcp6       0      0 [::]:ssh                [::]:*                  LISTEN      564/sshd
    tcp6       0      0 [::]:smtp               [::]:*                  LISTEN      4112/master
    tcp6       0      0 [::]:imaps              [::]:*                  LISTEN      3210/dovecot
    tcp6       0      0 [::]:pop3s              [::]:*                  LISTEN      3210/dovecot
    
    Code:
    $ dig mx lists.teachers.net
    
    ; <<>> DiG 9.8.1-P1 <<>> mx lists.teachers.net
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22244
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
    
    ;; QUESTION SECTION:
    ;lists.teachers.net.            IN      MX
    
    ;; ANSWER SECTION:
    lists.teachers.net.     300     IN      MX      100 lists.teachers.net.
    
    ;; AUTHORITY SECTION:
    teachers.net.           2057    IN      NS      dns1.stabletransit.com.
    teachers.net.           2057    IN      NS      dns2.stabletransit.com.
    
    ;; ADDITIONAL SECTION:
    lists.teachers.net.     300     IN      A       50.56.184.186
    dns1.stabletransit.com. 77665   IN      A       69.20.95.4
    dns2.stabletransit.com. 77741   IN      A       65.61.188.4
    
    ;; Query time: 830 msec
    ;; SERVER: 72.3.128.241#53(72.3.128.241)
    ;; WHEN: Thu Jan 10 14:08:34 2013
    ;; MSG SIZE  rcvd: 155
    
    How can I troubleshoot this, maybe from a remote machine? What logs might shed light? What other info would be helpful here? Thanks!
     
  2. falko

    falko Super Moderator ISPConfig Developer

    Are there any other firewalls or routers that might block access on POP3 or IMAP?
     
  3. BobSD

    BobSD New Member

    I figured it out, apparently SBC blocks port 25 on outgoing u-verse traffic. I enabled port 587 and immediately was able to access to smtp service from Eudora. Thanks for your help! (Do I mark this "solved" or something?)
     

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