From: Randy Ramsdell (rramsdelllivedatagroup.com)
Date: Wed Apr 30 2008 - 10:34:13 CDT

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aziz knina wrote:
> Hi,
>
> I'm a new user of postfix.
> my case is a little bit particular: my company have rent a server at
> an ISP.
> this machine is located at a datacenter of this ISP, in which we have
> installed RHEL 5 and postfix.
>
> the ISP had opened all necessary port: SMTP, POP3, IMAP, WWW...
> here below the postconf of the server:
> ------------------------------
> alias_database = hash:/etc/postfix/aliases
> alias_maps = hash:/etc/aliases
> command_directory = /usr/sbin
> config_directory = /etc/postfix
> daemon_directory = /usr/libexec/postfix
> debug_peer_level = 2
> html_directory = no
> inet_interfaces = all
> mail_owner = postfix
> mail_spool_directory = /var/spool/mail
> mailbox_command = /usr/bin/procmail -a "$EXTENSION"
> mailq_path = /usr/bin/mailq
> manpage_directory = /usr/local/man
> mydestination = $myhostname, localhost.$mydomain,$mydomain ,localhost
> mydomain = mydomain.com <http://mydomain.com/>
> myhostname = hostname.mydomain.com <http://hostname.mydomain.com/>

Hopefully these are set to the domain you are accepting mail for.
> mynetworks = 168.100.189.0/28,127.0.0.0/8,0 .0.0.0/32
> <http://168.100.189.0/28,127.0.0.0/8,0.0.0.0/32>
> myorigin = $mydomain
> newaliases_path = /usr/bin/newaliases
> queue_directory = /var/spool/postfix
> readme_directory = no
> sample_directory = /etc/postfix
> sendmail_path = /usr/sbin/sendmail
> setgid_group = postdrop
> unknown_local_recipient_reject _code = 450
> ------------------------------ ---
>
> My problem is tha I can send emails to outside but I cannot receive
> emails from outside: I get the error:
> Technical details of permanent failure:
>
> TEMP_FAILURE: The recipient server did not accept our requests to
> connect. Learn more at http://mail.google.com/support /bin/answer.py
> <http://mail.google.com/support/bin/answer.py>?
> answer=7720
> [mail.mydomain.com <http://mail.mydomain.com/>. (10): Connection refused]
>
> the ISP says that there is no problem in his side.
>
> is there any thing that I can check/change in my configuration?
>
> Thank at advance for your help.
>
> Regards,
> Aziz
>
> _________________________________________________
>

telnet $yourmailserver 25

Then send a message.

or nmap -v -p 25 -P0 -sS $yourmailserver

Is port 25 open?

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