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From: Noel Jones on 27 Apr 2010 08:20
On 4/27/2010 3:46 AM, Guillaume Rousse wrote:
> Hello.
>
> I'm trying to set up an SMTP gateway for a subdomain
> (subdomain.domain.com) of a larger organisation (domain.com). The host
> is declared as the MX for foo.domain.com. I'd like it to be able to
> collect mails sent to @foo.domain.com, and redispatch them to individual
> hosts inside this subdomain, for specific processing.
>
> Here is my main.cf file:
> aemon_directory = /usr/lib64/postfix
>
> inet_interfaces = all
> mynetworks =
> 129.175.144.0/24
> 172.18.213.0/24
> 195.83.212.0/24
> 195.83.213.0/24
> 193.51.235.0/24
> 193.51.236.0/24
> 193.55.250.0/23
> 193.49.212.0/23
> 193.49.213.64/26
> 195.83.212.48/28
> myorigin = $mydomain
> delay_warning_time = 4h
> smtpd_banner = $myhostname ESMTP $mail_name
> mydestination =
> $myhostname
> $mydomain
> relayhost = smtp.domain.com
>
> alias_maps = hash:/etc/postfix/aliases
> alias_database = hash:/etc/postfix/aliases
>
> Here is my alias file:
> foo: foo(a)host.subdomain.domain.com
>
> With this configuration, a mail sent to foo(a)subdomain.domain.com is
> accepted, then forwarded to host.subdomain.domain.com as expected. But
> instead of directly sending it to host.subdomain.domain.com, it is
> immediatly relayed to the relay host, smtp.domain.com, whereas it is
> supposed to be a local mail address.

Rather than relayhost you might be able to use a
transport_maps something like:

..domain.com :
* relay:[smtp.domain.com]


Otherwise, transport_maps entries are required to override
relayhost.


-- Noel Jones

From: Noel Jones on 27 Apr 2010 09:55
On 4/27/2010 8:36 AM, Guillaume Rousse wrote:
> Le 27/04/2010 14:20, Noel Jones a écrit :
>> Otherwise, transport_maps entries are required to override relayhost.
> My point is, why should I have to override relayhost for email adresses
> inside my local domain, whereas I do have in my configuration:
> mydestination =
> smtp.$mydomain
> $myhostname
> $mydomain


mydestination is for mail delivered on the local machine; just
this one box.

>
> The 'Postfix on a local network' section, in
> http://www.postfix.org/STANDARD_CONFIGURATION_README.html
>
> just uses an alias files on the mailhost for sending mails to internal
> machines:
> /etc/aliases:
> joe: joe(a)joes.preferred.machine
> jane: jane(a)janes.preferred.machine

Only if you don't set relayhost.
http://www.postfix.org/postconf.5.html#relayhost

> Anyway, if I really need a transport map, is there a way to have a
> global entry, instead of explicitely declaring each internal machine:
>
> x.subdomain.domain.com: smtp:[x.subdomain.domain.com]
> y.subdomain.domain.com: smtp:[y.subdomain.domain.com]

Yes, see my previous email and also read
http://www.postfix.org/transport.5.html

-- Noel Jones

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