[CentOS] restricting mails from "mail" command to specific domains only in postfix

Chaminda Mendis chaminda at mfsl.lk
Fri Jan 2 08:49:09 UTC 2009


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?
>
>   
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