Hi, I'm not very familiar with postfix. I think you have to set "relayhost = ip or host name of CentOS relayin server" parameter in 5 Linux servers which are relaying there's mails via CentOS server. Try this. Thanks Joshua Gimer wrote: > On Thu, Jan 1, 2009 at 4:26 AM, ankush grover <ankushcentos at gmail.com> wrote: > >> 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. >> >> >> Regards >> >> Ankush >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> >> > > If you are using sendmail as the local MTA on these 5 systems > (default) did you change your smarthost configuration to forward mail > through your postfix mail relay? > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20090102/e57d1f76/attachment-0004.html>