Re: [gentoo-server] SPF Record with Multiple Servers

[Robert Bridge <robert@robbieab.com>]

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Just the internet facing one, as I understand it. Nothing else should ever
see the internal MTA, and it may not even have a routable IP address!


On 25 April 2013 16:57, Vinícius Ferrão <viniciusferrao@if.ufrj.br> wrote:

> Hello Halassy, thanks for your reply.
>
> I'm aware of the syntax, I just mistyped it.
>
> The main question still continues, should I put both MTAs or just the
> Internet facing one?
>
> Thanks in advance,
>
> Sent from my iPhone
>
> On 25/04/2013, at 05:14, "Halassy Zoltán" <zhalassy@loginet.hu> wrote:
>
> > Hello!
> >
> > Using MX in SPF record is a simple way to describe trivial two-way
> setups, that is, MX will also send the mails, not just receive them. If you
> have a non-trivial setup, you can use, for example IP addresses, like ip6:
> and ip4:. Add every address which from a mail could possibly leave your
> organization, and that's it, do not use MX. BTW, the syntax is v=spf1, not
> what you wrote.
> >
> > 2013-04-25 01:32 keltezéssel, Vinícius Ferrão írta:
> >> I've a question about the SPF setup in my domain.
> >>
> >> We have two MTAs: an exchange server that does not use SMTP to relay
> messages to the Internet and a Postfix Mail Gateway on the border to send
> and receive messages to/from the internet.
> >>
> >> The clients connect on the Exchange Server to relay messages to the
> external world. So an SMTP connection would start in the Exchange, then it
> relays to the Postfix server and then to the Internet. On the other hand
> when a message come from the Internet it first arrives in the Postfix
> server and after the processing it's handled to the Exchange server.
> >>
> >> The question is: which SPF TXT string I should use?
> >>
> >> The Postfix server is my only MX. And I don't know if I should include
> the Exchange Server name in the SPF rules.
> >>
> >> I was considering: vspf=1 mx -all
> >>
> >> But this does not include the Exchange, and I don't know if it's right
> or not.
> >
> >
>
>

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