Postfix - can't send/recieve mails to/from outside world

Discussion in 'Installation/Configuration' started by grosas, Nov 17, 2007.

  1. grosas

    grosas New Member

    Postfix - can't send/recieve mails to/from outside world

    Hello everyone:

    I followed the Perfect Setup Ubuntu 7.04 to install my server.
    Almost everything works ok, but Postfix throws some errors.

    These are the cases:
    NOTE: I've changed the servers' real names...I use myserver.com (my linux server) and recipient.com (external mail server)

    :confused: 1. If I try to send messages from Webmin mail interface (to addresses different to gmail.com and local - this does works ok) Postfix says it can't deliver the mails, here is part of my /var/log/mail.log

    Code:
    Nov 16 18:38:23 myserver postfix/smtp[12426]: certificate verification failed for recipient.com: num=18:self signed certificate
    Nov 16 18:38:24 myserver postfix/smtp[12426]: 2D2F397C3E2: to=<[email protected]>, relay=recipient[72.71.70.69]:25, delay=3.3, delays=0.02/0.$
    Nov 16 18:38:24 myserver postfix/cleanup[12424]: 7C57597C3E3: message-id=<[email protected]>
    Nov 16 18:38:24 myserver postfix/bounce[12428]: 2D2F397C3E2: sender non-delivery notification: 7C57597C3E3
    Nov 16 18:38:24 myserver postfix/qmgr[29547]: 7C57597C3E3: from=<>, size=2485, nrcpt=1 (queue active)
    Nov 16 18:38:24 myserver postfix/qmgr[29547]: 2D2F397C3E2: removed
    Nov 16 18:38:24 myserver postfix/local[12429]: 7C57597C3E3: to=<[email protected]>, relay=local, delay=0.02, delays=0.01/0/0/0, dsn=2.0.0, status=sent (delivered $
    Nov 16 18:38:24 myserver postfix/qmgr[29547]: 7C57597C3E3: removed

    :confused: 2. I can't neither send nor receive messages with my email clients (thunderbird and evolution). I checked the "server requires authentication" option, using every possible combination (TLS, SSL, No security, etc) but it time outs the connection.

    :) 3. I can send messages to gmail.com and yahoo.com (with some troubles, I use the "force queued" webmin feature ), but not to hotmail.com

    This is my main.cf
    Code:
    smtpd_banner = $myhostname ESMTP $mail_name (Linux)
    biff = no
    append_dot_mydomain = no
    
    # TLS parameters
    smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
    smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
    smtpd_use_tls = yes
    smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
    smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
    
    myhostname = myserver.com
    alias_maps = hash:/etc/aliases
    alias_database = hash:/etc/aliases
    myorigin = /etc/mailname
    mydestination = 
    relayhost =
    mynetworks = 127.0.0.0/8
    mailbox_command =
    mailbox_size_limit = 0
    recipient_delimiter = +
    inet_interfaces = all
    inet_protocols = all
    smtpd_sasl_local_domain =
    smtpd_sasl_auth_enable = yes
    smtpd_sasl_security_options = noanonymous
    broken_sasl_auth_clients = yes
    smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
    smtpd_tls_auth_only = no
    smtp_use_tls = yes
    smtp_tls_note_starttls_offer = yes
    smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
    smtpd_tls_loglevel = 1
    smtpd_tls_received_header = yes
    smtpd_tls_session_cache_timeout = 3600s
    tls_random_source = dev:/dev/urandom
    
    virtual_maps = hash:/etc/postfix/virtusertable
    
    home_mailbox = Maildir/
    My master.cf is:

    Code:
    smtp      inet  n       -       -       -       -       smtpd
    pickup    fifo  n       -       -       60      1       pickup
    cleanup   unix  n       -       -       -       0       cleanup
    qmgr      fifo  n       -       n       300     1       qmgr
    tlsmgr    unix  -       -       -       1000?   1       tlsmgr
    rewrite   unix  -       -       -       -       -       trivial-rewrite
    bounce    unix  -       -       -       -       0       bounce
    defer     unix  -       -       -       -       0       bounce
    trace     unix  -       -       -       -       0       bounce
    verify    unix  -       -       -       -       1       verify
    flush     unix  n       -       -       1000?   0       flush
    proxymap  unix  -       -       n       -       -       proxymap
    smtp      unix  -       -       -       -       -       smtp
    relay     unix  -       -       -       -       -       smtp
    	-o fallback_relay=
    showq     unix  n       -       -       -       -       showq
    error     unix  -       -       -       -       -       error
    discard   unix  -       -       -       -       -       discard
    local     unix  -       n       n       -       -       local
    virtual   unix  -       n       n       -       -       virtual
    lmtp      unix  -       -       -       -       -       lmtp
    anvil     unix  -       -       -       -       1       anvil
    scache	  unix	-	-	-	-	1	scache
    
    maildrop  unix  -       n       n       -       -       pipe
      flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
    
    uucp      unix  -       n       n       -       -       pipe
      flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
    
    ifmail    unix  -       n       n       -       -       pipe
      flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
    bsmtp     unix  -       n       n       -       -       pipe
      flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
    scalemail-backend unix	-	n	n	-	2	pipe
      flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
    mailman   unix  -       n       n       -       -       pipe
      flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
      ${nexthop} ${user}
    
    My /etc/postfix/local-host-names is:

    Code:
    # ISPConfig local-host-names Configuration File
    localhost
    myserver.com
    localhost.myserver.com
    localhost.com
    localhost.localdomain
    
    I'm not using ISPConfig, but I'd installed it.

    I did do the next step:

    Code:
    "If you do not want to use ISPConfig, configure Postfix to deliver emails to a user's Maildir*:
    
    postconf -e 'home_mailbox = Maildir/'
    postconf -e 'mailbox_command ='
    /etc/init.d/postfix restart"
    I did it because I don't use it.

    I did "telnet localhost 25" and this is the result:

    Code:
    [email protected]:~$ telnet localhost 25
    Trying 127.0.0.1...
    Connected to localhost.
    Escape character is '^]'.
    220 myserver.com ESMTP Postfix (Linux)
    ehlo localhost
    250-myserver.com
    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.
    
    _________FOLLOW IN THE NEXT POST DUE TO SIZE RESTRICTION__________
     
    Last edited: Nov 17, 2007
  2. grosas

    grosas New Member

    Postfix - can't send/recieve mails to/from outside world (part 2)

    My netstat -tap shows thw following:

    Code:
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
    tcp        0      0 *:afs3-update           *:*                     LISTEN     12178/nxagent       
    tcp        0      0 localhost:2208          *:*                     LISTEN     8820/hpiod          
    tcp        0      0 *:mysql                 *:*                     LISTEN     31881/mysqld        
    tcp        0      0 *:netbios-ssn           *:*                     LISTEN     4567/smbd           
    tcp        0      0 *:webmin                *:*                     LISTEN     21962/perl          
    tcp        0      0 *:www                   *:*                     LISTEN     1678/apache2        
    tcp        0      0 *:81                    *:*                     LISTEN     4776/ispconfig_http 
    tcp        0      0 *:ftp                   *:*                     LISTEN     23734/proftpd: (acc 
    tcp        0      0 myserver.local:domain       *:*                     LISTEN     4963/named          
    tcp        0      0 localhost:domain        *:*                     LISTEN     4963/named          
    tcp        0      0 localhost:ipp           *:*                     LISTEN     3240/cupsd          
    tcp        0      0 *:smtp                  *:*                     LISTEN     29542/master        
    tcp        0      0 localhost:953           *:*                     LISTEN     4963/named          
    tcp        0      0 localhost:6010          *:*                     LISTEN     12890/sshd: [email protected] 
    tcp        0      0 *:https                 *:*                     LISTEN     1678/apache2        
    tcp        0      0 *:microsoft-ds          *:*                     LISTEN     4567/smbd           
    tcp        0      0 localhost:2207          *:*                     LISTEN     8823/python         
    tcp        0      0 localhost:35912         localhost:5008          ESTABLISHED12925/nxssh         
    tcp        0      0 localhost:5008          localhost:35912         ESTABLISHED12178/nxagent       
    tcp        0      0 localhost:41708         localhost:ssh           TIME_WAIT  -                   
    tcp        0      0 localhost:41706         localhost:ssh           TIME_WAIT  -                   
    tcp        0      0 localhost:41707         localhost:ssh           TIME_WAIT  -                   
    tcp        0      0 localhost:41086         localhost:ssh           ESTABLISHED12159/nxssh         
    tcp6       0      0 *:afs3-update           *:*                     LISTEN     12178/nxagent       
    tcp6       0      0 *:imaps                 *:*                     LISTEN     4432/couriertcpd    
    tcp6       0      0 *:pop3s                 *:*                     LISTEN     4476/couriertcpd    
    tcp6       0      0 *:pop3                  *:*                     LISTEN     4445/couriertcpd    
    tcp6       0      0 *:imap2                 *:*                     LISTEN     4412/couriertcpd    
    tcp6       0      0 *:domain                *:*                     LISTEN     4963/named          
    tcp6       0      0 *:ssh                   *:*                     LISTEN     4601/sshd           
    tcp6       0      0 *:smtp                  *:*                     LISTEN     29542/master        
    tcp6       0      0 ip6-localhost:953       *:*                     LISTEN     4963/named          
    tcp6       0      0 ip6-localhost:6010      *:*                     LISTEN     12890/sshd: [email protected] 
    tcp6       0      0 localhost:ssh           localhost:41086         ESTABLISHED12160/sshd: myuser [pr 
    tcp6       0      0 ::ffff:10.20.14.76%:ssh dsl-189-164-188-2:55574 ESTABLISHED11999/sshd: myuser [pr 
    tcp6       0   2592 ::ffff:10.20.14.76%:ssh dsl-189-164-188-2:59810 ESTABLISHED12888/sshd: nx [pri 
    I don't know why, but I found the following in my /var/log/mail.err

    Code:
    Nov 15 18:19:24 imep postfix/sendmail[23609]: fatal: usage: sendmail [options]
    Nov 15 18:19:34 imep postfix/sendmail[23614]: fatal: usage: sendmail [options]
    The returned messages shows:

    Code:
    This is the mail system at host myserver.com
    
    I'm sorry to have to inform you that your message could not
    be delivered to one or more recipients. It's attached below.
    
    For further assistance, please send mail to postmaster.
    
    If you do so, please include this problem report. You can
    delete your own text from the attached returned message.
    
                       The mail system
    
    <[email protected]>: host recipient.com[72.29.90.31] said:
        550-Verification failed for <[email protected]> 550-No Such User Here 550
        Sender verify failed (in reply to RCPT TO command)
    
    and

    Code:
    Reason for failure 	 550-Verification failed for <[email protected]> 550-No
    I know the user exists in recipient.com because that account is mine.

    :confused: 4. If I try to send messages from gmail.com to [email protected] gmail returns the following:

    Code:
    Delivery to the following recipient failed permanently:
    
        [email protected]
    
    Technical details of permanent failure:
    PERM_FAILURE: SMTP Error (state 13): 554 <[email protected]>: Relay access denied
    Please, Heeelp! I losing my mind due to this trouble!

    Sorry, but I don't speak english, I hope you can understand.

    Thanks in advance.
     
  3. falko

    falko Super Moderator ISPConfig Developer

    mydestination should read
    Code:
    mydestination = /etc/postfix/local-host-names
    in /etc/postfix/main.cf.

    Also make sure that your server isn't blacklisted ( http://www.mxtoolbox.com/blacklists.aspx ) and that your ISP doesn't block port 25.
     
  4. grosas

    grosas New Member

    Not blacklisted

    first, thanks a lot for your answer...

    second:

    1. My server isn't blocked.

    2. now, mydestination = /etc/postfix/local-host-names, but postfix throws the same errors as shown at my first and second posts.

    3. I don't know if my ISP is blocking the port 25, how can I know that?

    Supposing that my ISP is blocking the port 25, isn't it supposed that this port is to send mails and not for receive mails? and, isn't it supposed that blocking the port doesn't allow the incoming mails and outgoing mail should be received by recipients?

    Why I can't send mail from gmail to my server? isn't supposed that the mail is received through POP3 or IMAP port? it could be because the ports IMAP/993
    and POP3/995 could be blocked?

    I understand that, if I want to send mails through myserver.com with Evolution and the port 25 is blocked in my server, Evolution will not be able to send them. And that sending mails from my server's web-based mail client to servers that requires server authentication will no be possible due to the fact that I can't select the "server requires authentication" option in a web-based mail client.

    But, is there a web-based mail client which have such option?

    Thanks in advance...
     
  5. grosas

    grosas New Member

    smtp, pop, imap

    Does this means that port 25 is open?

    Code:
    tcp        0      0 *:smtp                  *:*                     LISTEN     29542/master           
    tcp6       0      0 *:imaps                 *:*                     LISTEN     4432/couriertcpd    
    tcp6       0      0 *:pop3s                 *:*                     LISTEN     4476/couriertcpd    
    tcp6       0      0 *:pop3                  *:*                     LISTEN     4445/couriertcpd    
    tcp6       0      0 *:imap2                 *:*                     LISTEN     4412/couriertcpd    
    tcp6       0      0 *:smtp                  *:*                     LISTEN     29542/master      
     
  6. falko

    falko Super Moderator ISPConfig Developer

    Ask your ISP.

    The whole SMTP communication happens on port 25. Your mailserver sends out mails on port 25, and the receiving server gets it on port 25 (and the other way round). Port 110 (POP3) is used only when your mail client (Outlook, Thunderbird, etc.) connets to your mail server to fetch mails.

    You don't need this in a webmail client because most mail servers allow connections from localhost without authentication, and a webmail client aƶmost always connects to a mailserver on localhost.
     
  7. grosas

    grosas New Member

    port is not blocked

    Again, thanks for your answer...

    My ISP says that my port 25 isn't blocked in any way, and I don't have any iptables rules or any other type of firewall; nmap shows that port is open, but shows the port as "open|filtered", shows my SSH port "open|filtered" too and I can connect to my server with no problems through port 22.


    what could be wrong?

    thanks in advance
     
  8. grosas

    grosas New Member

    One step beyond

    :cool: Well, I edited the encryption settings in Evolution Mail and Thunderbird and now I can send messages to servers not requiring server authentication as gmail, yahoo (not hotmail).

    I was using SSL to send messages instead of TSL or No Encryption (with this last options I can send messages through Evo and Thunderbird), I can't do it with SSL selected.

    :mad: Although I can send mails to some servers thtough Evo, I can't fetch the mails from myserver.com to Evo. Please help!

    :confused: If I send a mail (through Evo) to a server that requires server authentication, my mail.log shows the following:

    Code:
    Nov 19 18:10:23 myserver postfix/pickup[1859]: D07C1B24001: uid=0 from=<[email protected]>
    Nov 19 18:10:23 myserver postfix/cleanup[2884]: D07C1B24001: message-id=<[email protected]>
    Nov 19 18:10:23 myserver postfix/qmgr[21868]: D07C1B24001: from=<[email protected]>, size=13884, nrcpt=2 (queue active)
    Nov 19 18:10:26 myserver postfix/smtp[2886]: certificate verification failed for recipient.com: num=18:self signed certificate
    Nov 19 18:10:26 myserver postfix/smtp[2887]: D07C1B24001: to=<[email protected]>, relay=gmail-smtp-in.l.google.com[209.85.147.27]:25, delay=2.9, delays=0.02/$
    Nov 19 18:10:27 myserver postfix/smtp[2886]: D07C1B24001: to=<[email protected]>, relay=recipient.com[55.29.80.31]:25, delay=3.4, delays=0.02/0.0$
    Nov 19 18:10:27 myserver postfix/cleanup[2884]: 488A197C3DD: message-id=<[email protected]>
    Nov 19 18:10:27 myserver postfix/bounce[2888]: D07C1B24001: sender non-delivery notification: 488A197C3DD
    Nov 19 18:10:27 myserver postfix/qmgr[21868]: 488A197C3DD: from=<>, size=15798, nrcpt=1 (queue active)
    Nov 19 18:10:27 myserver postfix/qmgr[21868]: D07C1B24001: removed
    Nov 19 18:10:27 myserver postfix/local[2889]: 488A197C3DD: to=<[email protected]>, relay=local, delay=0.02, delays=0/0/0/0.01, dsn=2.0.0, status=sent (delivered t$
    Nov 19 18:10:27 myserver postfix/qmgr[21868]: 488A197C3DD: removed
    :confused: If I send a mail (through Evo) to hotmail, my mail.log shows the following:

    Code:
    Nov 19 18:19:21 imep postfix/smtpd[3003]: warning: 189.164.188.21: hostname dsl-189-164-188-21.prod.com verification failed: Name or service no$
    Nov 19 18:19:21 imep postfix/smtpd[3003]: connect from unknown[189.164.188.21]
    Nov 19 18:19:22 imep postfix/smtpd[3003]: 20EAB97C3D9: client=unknown[189.40.188.21], sasl_method=PLAIN, sasl_username=myuser
    Nov 19 18:19:22 imep postfix/cleanup[3007]: 20EAB97C3D9: message-id=<[email protected]>
    Nov 19 18:19:22 imep postfix/qmgr[21868]: 20EAB97C3D9: from=<[email protected]>, size=567, nrcpt=2 (queue active)
    Nov 19 18:19:22 imep postfix/smtpd[3003]: disconnect from unknown[189.164.188.21]
    Nov 19 18:19:23 imep postfix/smtp[3008]: 20EAB97C3D9: to=<[email protected]>, relay=mx3.hotmail.com[65.54.244.200]:25, delay=1, delays=0.36/0.01/0.41$
    Nov 19 18:19:23 imep postfix/smtp[3008]: 20EAB97C3D9: to=<[email protected]>, relay=mx3.hotmail.com[65.54.244.200]:25, delay=1, delays=0.36/0.01/0.41/0.2$
    Nov 19 18:19:23 imep postfix/qmgr[21868]: 20EAB97C3D9: removed
    
    I appreciate your help. Thanks in advance.
     
  9. grosas

    grosas New Member

    two steps beyond

    :cool: Well, I edited the encryption settings in POP3 Evolution Mail and Thunderbird (now is SSL) and and now I can receive messages from my server.

    I think this could be very difficult to the final users to configure theirs outlook/thunderbird with POP3 SSL and SMPT TSL.

    Is there a way in which I don't need to put SSL to POP3?

    I still can't send mails through Evo and gmail (etc webmails )to my server...:mad:
     
  10. falko

    falko Super Moderator ISPConfig Developer

    Are you sure you followed the tutorial as close as possible? Because you don't need SSL to connect to the server.
     
  11. grosas

    grosas New Member

    tutorial

    Yes, but I see something weird in the SSL certificate, Thunderbird says something like: "you're trying to connect to myserver.com but the SSL certificate owns to localhost"
     
  12. grosas

    grosas New Member

    Here again

    Hi, I've followed again the Perfect setup 7.04 tutorial, after uninstall what I'd installed the first time.

    Same errors occurred, please, what can I do?
     
  13. falko

    falko Super Moderator ISPConfig Developer

    Please try to use normal POP3 (port 110) and SMTP (port 25) - no SSL or TLS.
     
  14. grosas

    grosas New Member

    reconfigure

    Ok, but now I have my postfix configured to work with TLS and SSL, how can I reconfigure it to work without TLS and SSL and to work with the normal ports?
     
  15. falko

    falko Super Moderator ISPConfig Developer

    If you've followed the "Perfect Setup", then your setup is already capable of doing this.
     
  16. grosas

    grosas New Member

    switch ports

    When you say: "try to use normal POP3 (port 110) and SMTP (port 25)", do you mean I need to change a configuration in some place?
    where I need to switch the ports?

    Thanks again and sorry, I'm a newbie as you can see :(
     
  17. grosas

    grosas New Member

    Testing

    Well, I don't know if this is what you asked for, but:

    These are the cases using Thunderbird:

    INCOMING MAIL
    :confused: 1. I can't receive mails if one of the

    Code:
    "TLS, if available" (Port 110), "TLS" (Port 110), or "Never" (Port 110) 
    options is selected, Thunderbird returns

    Code:
    Connection to server myserver.com timed out
    :confused: 2. I cant' receive mails if "use secure authentication" option is selected, it doesn't matter which option of point 1 is selected. Thunderbird returns:

    Code:
    "Mail server does not support secure authentication"
    :confused: 3. I can fetch mails only if I select the "SSL(Port 995) option in "Use secure connection" and if I don't select "use secure authentication".

    OUTGOING MAIL
    :confused: 1. In "Security and Authentication" I select "Use name and password", User name: myuser.

    If I select "Use secure connection->No" (Port 25) I can send messages to gmail and yahoo, but hotmail (no errors are returned, simply the mail doesn't appear in hotmail inbox).
    I can send messages to some domains different to gmail and yahoo (those domains aren't public webmail services) , but I can send mails to 2 domains in different shared hostings.

    Code:
    <[email protected]_hosting_domain.com>: host shared_hosting_domain.com[73.69.10.37] said:
        550-Verification failed for <[email protected] > 550-No Such User Here 550
        Sender verify failed (in reply to RCPT TO command)
    2. If I select "Use secure connection->TLS" (Port 25) Thunderbird throws the following in an alert window:
    Code:
    Unable to verify the identity of MYSITE as a trusted site.
    
    Posible reasons for this error:
    -Your browser does not recognize the Certificate Authority that issued the site's certificate.
    -The site's certificate is incomplete due to a server misconfiguration.
    -You are connected to a site pretending to be MYSITE, posible to obtain your confidential information.
    
    Please notify the site's webmaster about this problem.
    
    Before accepting this certificate, you should examine this site's certificate carefully. Are you willing to accept this certificate for the purpose of identifying the Web Site MYSITE
    
    Button -> Examine Certificate...
    
    [  ] Accept this certificate permanently
    [x] Accept this certificate temporarily for this session
    [  ] Do not accept...
    If a click in the "Examine Certificate" button shows:

    Code:
    Could not verify this certificate for unknown reasons.
    Sometimes shows:

    Code:
    Issued To:
    Common Name (CN) MYSITE
    bla bla bla
    other times shows:

    Code:
    Issued To:
    Common Name (CN) localhost
    bla bla bla
    After accepting the certificate, the mails are either sent or rejected the same way I wrote in point 1 of INCOMING MAIL

    3. If I select "Use secure connection->SSL" (Port 465) Thunderbird throws the following after a few seconds:

    Code:
    Sending of message failed.
    The message could not be sent because connecting to SMTP server myserver.comfailed. The server may be unavailable or is refusing SMTP connections.
    As an interesting fact, port 465 is closed.

    Well, these are the cases
     
  18. falko

    falko Super Moderator ISPConfig Developer

    What are the outputs of
    Code:
    netstat -tap
    and
    Code:
    iptables -L
    ?
     
  19. grosas

    grosas New Member

    Netstat and iptables

    netstat -tap

    Code:
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
    tcp        0      0 localhost:2208          *:*                     LISTEN     8820/hpiod
    tcp        0      0 *:7010                  *:*                     LISTEN     16527/nxagent
    tcp        0      0 *:mysql                 *:*                     LISTEN     31881/mysqld
    tcp        0      0 *:netbios-ssn           *:*                     LISTEN     4567/smbd
    tcp        0      0 *:www                   *:*                     LISTEN     6086/apache2
    tcp        0      0 *:webmin                *:*                     LISTEN     21962/perl
    tcp        0      0 *:81                    *:*                     LISTEN     4776/ispconfig_http
    tcp        0      0 *:ftp                   *:*                     LISTEN     23734/proftpd: (acc
    tcp        0      0 myserver.local:domain       *:*                     LISTEN     4963/named
    tcp        0      0 localhost:domain        *:*                     LISTEN     4963/named
    tcp        0      0 localhost:ipp           *:*                     LISTEN     29168/cupsd
    tcp        0      0 *:smtp                  *:*                     LISTEN     23194/master
    tcp        0      0 localhost:953           *:*                     LISTEN     4963/named
    tcp        0      0 *:https                 *:*                     LISTEN     6086/apache2
    tcp        0      0 *:microsoft-ds          *:*                     LISTEN     4567/smbd
    tcp        0      0 localhost:2207          *:*                     LISTEN     8823/python
    tcp        0      0 localhost:57756         localhost:ssh           ESTABLISHED16508/nxssh
    tcp6       0      0 *:imaps                 *:*                     LISTEN     18748/couriertcpd
    tcp6       0      0 *:7010                  *:*                     LISTEN     16527/nxagent
    tcp6       0      0 *:pop3s                 *:*                     LISTEN     18653/couriertcpd
    tcp6       0      0 *:pop3                  *:*                     LISTEN     18593/couriertcpd
    tcp6       0      0 *:imap2                 *:*                     LISTEN     18698/couriertcpd
    tcp6       0      0 *:domain                *:*                     LISTEN     4963/named
    tcp6       0      0 *:ssh                   *:*                     LISTEN     4601/sshd
    tcp6       0      0 *:smtp                  *:*                     LISTEN     23194/master
    tcp6       0      0 ip6-localhost:953       *:*                     LISTEN     4963/named
    tcp6       0   3268 ::ffff:10.20.14.76%:ssh dsl-189-164-12-234:1882 ESTABLISHED31832/sshd: myuser [pr
    tcp6       0      0 localhost:ssh           localhost:57756         ESTABLISHED16509/sshd: myuser [pr
    
    iptables -L (with sudo)

    Code:
    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
    
    iptables -L (without sudo, I mean with myuser)
    Code:
    iptables v1.3.6: can't initialize iptables table `filter': Permission denied (you must be root)
    Perhaps iptables or your kernel needs to be upgraded.
    Thanks again!!
     
  20. Linocks

    Linocks New Member

    Mail Problems

    Falko,

    I am having the same problem.

    I get the 'Bounce' message (see attached file 'bounce.txt') when I send messages to hotmail.

    Mydestination reads : -
    Code:
    /etc/postfix/main.cf.
    I have checked & my IP is on the 'Black-List' (see attached file 'blacklist.txt' - some of the sites are in a foreign language and I can't even read the reason for being placed on there). How do I remove it/get it removed? How did it get there? One suggestion is because I have a Dynamic IP address.

    I am a subscriber to DynDNS.com as a result of having a dynamic IP address. Can I use this facility to prevent being blocked?

    My ISP does not block port 25.

    How do I fix the problem??

    Please help.:confused:
     

    Attached Files:

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