how to secure a smtp gateway with transport map settings?

Good morning,

Here is a schematic drawing on which I have some understanding problems.
http://baud.homelinux.net/postfix.jpg

We have two lan which have the same mail domain name: @paris.com
The two smtp gateway (smtp_hol and smtp_sis) are the gateway for this
domain. The primary mx is smtp_hol and the backup mx for @paris.com is
smtp_sis.
The first gateway transfers emails to the lan, to a server domino.

I don't understand how I can secure my first smtp gateway, smtp_hol, which
transport map setting, if the principal domino server is out of order?

Is it correct to use transport map?

Here is my setting: /etc/postfix/transport
paris.com smtp:10.0.3.1

Thank for your answer
Baud

On 2004-09-10 10:44, Baud wrote:
> Good morning,
>
> Here is a schematic drawing on which I have some understanding problems.
> http://baud.homelinux.net/postfix.jpg
>
> We have two lan which have the same mail domain name: @paris.com
> The two smtp gateway (smtp_hol and smtp_sis) are the gateway for this
> domain. The primary mx is smtp_hol and the backup mx for @paris.com is
> smtp_sis.
> The first gateway transfers emails to the lan, to a server domino.
>
> I don't understand how I can secure my first smtp gateway, smtp_hol, which
> transport map setting, if the principal domino server is out of order?
>
> Is it correct to use transport map?
>
> Here is my setting: /etc/postfix/transport
> paris.com smtp:10.0.3.1
>
> Thank for your answer
> Baud
>
>
>
>
>
>
>

I guess you must use smtp:[10.0.3.1] to avoid a DNS lookup of a MX record.
<http://www.postfix.org/transport.5.html>

/bb

Thx for your answer.

In fact, we would like to secure our smtp gateway in order to, in case of a
crash of lotus servers, redirect ours mails to the other lotus server. It's
the problem which exposed here.http://baud.homelinux.net/postfix.jpg

I mean, could we imagine to build a dns service on the smtp gateway in order
to put a mx record of our domain name "@paris.com", which points to the
primary lotus notes with a coeff. of 10, and 20 points to the second lotus
notes server?

Thank by advance.
Baud
And sorry for my poor english ;-)


"Birger Blixt" <Birger.Blixt@uab.ericsson.se> a écrit dans le message de
news:wm_1d.72$Q%1.127011@uab.ericsson.se...
> On 2004-09-10 10:44, Baud wrote:
> > Good morning,
> >
> > Here is a schematic drawing on which I have some understanding problems.
> > http://baud.homelinux.net/postfix.jpg
> >
> > We have two lan which have the same mail domain name: @paris.com
> > The two smtp gateway (smtp_hol and smtp_sis) are the gateway for this
> > domain. The primary mx is smtp_hol and the backup mx for @paris.com is
> > smtp_sis.
> > The first gateway transfers emails to the lan, to a server domino.
> >
> > I don't understand how I can secure my first smtp gateway, smtp_hol,
which
> > transport map setting, if the principal domino server is out of order?
> >
> > Is it correct to use transport map?
> >
> > Here is my setting: /etc/postfix/transport
> > paris.com smtp:10.0.3.1
> >
> > Thank for your answer
> > Baud
> >
> >
> >
> >
> >
> >
> >
>
> I guess you must use smtp:[10.0.3.1] to avoid a DNS lookup of a MX record.
> <http://www.postfix.org/transport.5.html>
>
> /bb