From: Adam Jacob Muller (lists-postfixadam.gs)
Date: Sat Dec 09 2006 - 12:17:10 CST

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Are you actually able to connect out?
The nmap scan you showed indicates your machine is listening on port
25 (which, it is from here too).
And says nothing of your ability to connect OUT to other MTA's on
port 25.
Check, that (with telnet <host> 25) and see what occurs.
The most likely situation is that your ISP is filtering your port 25
outbound (http://michael.toren.net/code/tcptraceroute/ will help you
figure out who is dropping your packets).

-Adam

On Dec 9, 2006, at 1:12 PM, qabsa wrote:

> HELLO,
>
> Could you please help me ASAP !!!
>
> I have installed a mail server with postfix and ispconfig control
> panel, this server is configured for multiple domains hosting,
> Now i test it for one domain "biblionat.dz", the DNS seems
> correctly configured for the MX record and PTR record too :
> 1 - mail.biblionat.dz =======> 80.246.0.7
> 80.246.0.7 =======> mail.biblionat.dz
>
> 2 - the machine can be reached from the Internet on its 25 and 110
> ports (telnet) and has all necessary ports open :
> Result of nmap scan :
> bensalahmypc]$ nmap -sT mail.biblionat.dz
> Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2006-12-09
> 18:13 CET
> Interesting ports on mail.biblionat.dz (80.246.0.7):
> (The 1657 ports scanned but not shown below are in state: filtered)
> PORT STATE SERVICE
> 21/tcp open ftp
> 25/tcp open smtp
> 53/tcp closed domain
> 80/tcp open http
> 81/tcp open hosts2-ns
> 110/tcp open pop3
> Nmap finished: 1 IP address (1 host up) scanned in 29.007 seconds
>
>
> ===========>>> I can receive but I can't send emails !
>
> I still have the same errors when i try to send emails to all other
> domains from the webmail :
>
> Dec 9 18:52:57 ns3 postfix/smtpd[13718]: connect from unknown
> [127.0.0.1]
> Dec 9 18:52:57 ns3 postfix/smtpd[13718]: 75207639CC9:
> client=unknown[127.0.0.1]
> Dec 9 18:52:57 ns3 postfix/cleanup[13720]: 75207639CC9: message-
> id=<20061209175257.75207639CC9mail.biblionat.dz>
> Dec 9 18:52:57 ns3 postfix/qmgr[12670]: 75207639CC9:
> from=<biblionatbiblionat.dz>, size=718, nrcpt=2 (queue active)
> Dec 9 18:52:57 ns3 postfix/smtpd[13718]: disconnect from unknown
> [127.0.0.1]
> Dec 9 18:52:57 ns3 postfix/smtp[13775]: connect to ns2.tda.dz
> [80.246.0.3]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 ipop3d[13776]: pop3 service init from 127.0.0.1
> Dec 9 18:52:57 ns3 postfix/smtp[13775]: 75207639CC9:
> to=<isptda.dz>, relay=none, delay=0, status=deferred (connect to
> ns2.tda.dz[80.246.0.3]: Connection refused)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> b.mx.mail.yahoo.com[66.196.97.250]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> f.mx.mail.yahoo.com[68.142.202.247]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> a.mx.mail.yahoo.com[209.191.118.103]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> f.mx.mail.yahoo.com[209.191.88.247]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> c.mx.mail.yahoo.com[68.142.237.182]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> g.mx.mail.yahoo.com[206.190.53.191]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> d.mx.mail.yahoo.com[216.39.53.2]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> c.mx.mail.yahoo.com[216.39.53.3]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> e.mx.mail.yahoo.com[216.39.53.1]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> g.mx.mail.yahoo.com[209.191.88.239]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: connect to
> h.mx.mail.yahoo.com[68.142.237.182]: Connection refused (port 25)
> Dec 9 18:52:57 ns3 postfix/smtp[13777]: 75207639CC9:
> to=<qabsayahoo.fr>, relay=none, delay=0, status=deferred (connect
> to h.mx.mail.yahoo.com[68.142.237.182]: Connection refused)
>
>
> postfix configuration :
>
> main.cf is :
>
> # postconf -n
> alias_maps = hash:/etc/aliases
> broken_sasl_auth_clients = no
> command_directory = /usr/sbin
> config_directory = /etc/postfix
> daemon_directory = /usr/libexec/postfix
> debug_peer_level = 5
> html_directory = no
> inet_interfaces = all
> local_recipient_maps = unix:passwd.byname $alias_maps
> mail_owner = postfix
> mailq_path = /usr/bin/mailq.postfix
> manpage_directory = /usr/share/man
> mydestination = /etc/postfix/local-host-names
> mydomain = biblionat.dz
> myhostname = mail.biblionat.dz
> mynetworks = 80.246.0.0/20, 192.168.1.0/24, 168.100.189.0/28,
> 127.0.0.0/8
> mynetworks_style = subnet
> myorigin = $mydomain
> newaliases_path = /usr/bin/newaliases.postfix
> queue_directory = /var/spool/postfix
> readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES
> sample_directory = /usr/share/doc/postfix-2.2.2/samples
> sendmail_path = /usr/sbin/sendmail.postfix
> setgid_group = postdrop
> smtp_tls_note_starttls_offer = yes
> smtp_use_tls = no
> smtpd_banner = $myhostname ESMTP $mail_name
> smtpd_recipient_restrictions =
> permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
> smtpd_sasl_auth_enable = no
> smtpd_sasl_local_domain =
> smtpd_sasl_security_options = noanonymous
> smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
> smtpd_tls_auth_only = no
> smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
> smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
> smtpd_tls_loglevel = 1
> smtpd_tls_received_header = yes
> smtpd_tls_session_cache_timeout = 3600s
> smtpd_use_tls = no
> tls_random_source = dev:/dev/urandom
> unknown_local_recipient_reject_code = 550
>
> and the master.cf is :
>
> #
> ======================================================================
> ====
> # service type private unpriv chroot wakeup maxproc command + args
> # (yes) (yes) (yes) (never) (100)
> #
> ======================================================================
> ====
> smtp inet n - n - - smtpd
> #submission inet n - n - - smtpd
> # -o smtpd_etrn_restrictions=reject
> # -o smtpd_client_restrictions=permit_sasl_authenticated,reject
> #smtps inet n - n - - smtpd
> # -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
> #submission inet n - n - - smtpd
> # -o smtpd_etrn_restrictions=reject
> # -o smtpd_enforce_tls=yes -o smtpd_sasl_auth_enable=yes
> #628 inet n - n - - qmqpd
> pickup fifo n - n 60 1 pickup
> cleanup unix n - n - 0 cleanup
> qmgr fifo n - n 300 1 qmgr
> #qmgr fifo n - n 300 1 oqmgr
> tlsmgr unix - - n 1000? 1 tlsmgr
> rewrite unix - - n - - trivial-
> rewrite
> bounce unix - - n - 0 bounce
> defer unix - - n - 0 bounce
> trace unix - - n - 0 bounce
> verify unix - - n - 1 verify
> flush unix n - n 1000? 0 flush
> proxymap unix - - n - - proxymap
> smtp unix - - n - - smtp
> # When relaying mail as backup MX, disable fallback_relay to avoid
> MX loops
> relay unix - - n - - smtp
> -o fallback_relay=
> # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
> showq unix n - n - - showq
> error unix - - n - - error
> discard unix - - n - - discard
> local unix - n n - - local
> virtual unix - n n - - virtual
> lmtp unix - - n - - lmtp
> anvil unix - - n - 1 anvil
> scache unix - - n - 1 scache
> #
> # ====================================================================
> # Interfaces to non-Postfix software. Be sure to examine the manual
> # pages of the non-Postfix software to find out what options it wants.
> #
> # Many of the following services use the Postfix pipe(8) delivery
> # agent. See the pipe(8) man page for information about ${recipient}
> # and other message envelope options.
> # ====================================================================
> #
> # maildrop. See the Postfix MAILDROP_README file for details.
> # Also specify in main.cf: maildrop_destination_recipient_limit=1
> #
> maildrop unix - n n - - pipe
> flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
> #
> # The Cyrus deliver program has changed incompatibly, multiple times.
> #
> old-cyrus unix - n n - - pipe
> flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m $
> {extension} ${user}
> # Cyrus 2.1.5 (Amos Gouaux)
> # Also specify in main.cf: cyrus_destination_recipient_limit=1
> cyrus unix - n n - - pipe
> user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m $
> {extension} ${user}
> #
> # See the Postfix UUCP_README file for configuration details.
> #
> uucp unix - n n - - pipe
> flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail
> ($recipient)
> #
> # Other external delivery methods.
> #
> 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=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop
> $recipient
>
>
>
>
>
>
>
> Découvrez une nouvelle façon d'obtenir des réponses à toutes vos
> questions ! Profitez des connaissances, des opinions et des
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