thnx Mich, I will try out the solution. walu. nb: good to know your upgrade to "wearing suits" has not blunted out your technical fingers... --- On Thu, 12/16/10, Michuki Mwangi <mwangi@isoc.org> wrote: From: Michuki Mwangi <mwangi@isoc.org> Subject: Re: [Skunkworks] Postfix as a relay:-HOWTO? To: "Skunkworks Mailing List" <skunkworks@lists.my.co.ke> Cc: "Walubengo J" <jwalu@yahoo.com> Date: Thursday, December 16, 2010, 1:18 PM Hi Walu, You will need to edit the main.cf and add the domain xxx.xx.ke to the relay_domains and smtp restrictions. for example relay_domains = $mydestination xxx.xx.ke add the relay domains check in the smtp recipient restrictions. smtpd_recipient_restrictions = permit_mynetworks check_relay_domains Then you will need to define the transport transport_maps = hash:/path/to/transport/file inside transport file xxx.xx.ke    smtp:hostname/IP Then once completed. Create the transport database from the prompt (while inside the transport file directory) postmap transport HTH - also please see http://www.postfix.org/STANDARD_CONFIGURATION_README.html#backup I have never had to do this type of config before but ideally the url above should clear some of the challenges. Regards, Michuki. On 12/16/10 9:03 AM, Walubengo J wrote:

Quick one,

I have postfix (on ubuntu) as the main smtp facing the internet. Its already configured and is receiving nd sending mail on behalf of the domain xxx.xx.ke

Now, I have another internal mail server (on the inside 192.x.x.x.) that routes internal mails and forwards external mails to the postfix server for outbound delivery.

Problem: How to configure Postfix to forward inbound external(internet-based) mails to the internal mail server. Do I tweak the "transport.db" or the "virtual.db" files to get his working and how?

walu.

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