On Sat, Jan 3, 2009 at 5:07 AM, mouss <mouss at ml.netoyen.net> wrote: > ankush grover a écrit : >> Hi Friends, >> >> I have configured Postfix mail server on Centos for relaying mails >> from 5 linux servers (including itself) within the same LAN. The >> postfix mail server should relay mails from these 5 linux servers for >> specific domains only. For example hosts 192.168.0.23/24/25/26/27 and >> the postfix mail server should only be able to receive and send mails >> from and to example.com,example2.com and example3.com domains only. >> Below is the configuration of the postfix mail server >> >> myhostname = test.example.com >> myorigin = $mydomain >> inet_interfaces = all >> mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain >> mynetworks_style = subnet >> mynetworks = 192.168.0.23/32,192.168.0.24/32,192.168.0.25/32,127.0.0.1/32,192.168.0.26/32,192.168.0.27/32 >> ,relay_domains = $mydestination,example.com,example2.com,example3.com >> smtpd_recipient_restrictions = >> reject_unauth_destination,permit_mynetworks,reject >> >> >> The issue I am facing is that whenever things are working fine when I >> check the things through telnet but when I do testing through command >> line through "mail" command I am able to send mails to any domain from >> these 5 servers. >> >> bash-2.05$ telnet test.example.com 25 >> Trying 192.168.0.27... >> Connected to test. >> Escape character is '^]'. >> 220 test.example.com ESMTP Postfix (2.2.5) >> mail from:ankush.grover at example.com >> 250 Ok >> 501 Syntax: RCPT TO: <address> >> rcpt to:ankush at gmail.com >> 554 <ankush at gmail.com>: Relay access denied >> >> >> How can I restrict mails even going through "mail" command from these >> 5 servers to specific domains only. These 5 servers are running some >> cronjobs and these cronjobs output it mailed through "mail" command. >> >> > > smtpd_*_restrictions apply to mail submitted via SMTP (which is the case > if you use telnet or if mail is received from a remote machine). but > mail submitted via the sendmail command (which is the case when you use > the 'mail' command) is not subject to these restrictions. > Seems so. > in short, with your current config, you have what you want except for > mail submitted via a sendmail on the relay itself. > The issue was on one of the linux server the relay host was not defined in sendmail and I was testing the mail configuration that server. Anyway now mails from other domains are getting denied from all the 5 servers and only thing left is how to restrict mails from the relay host (postfix mail server). Mouss has given a good example and I will try that. Thanks to all of you for helping me out :) Regards Ankush