Re: Are SPF fault tolerant ? How to make SPF records changed correctly ?

On Tue, Jul 13, 2004 at 07:11:00PM +0200, Ralf Doeblitz wrote:
> --On Montag, Juli 12, 2004 23:06:54 +0300 "Andrew G. Tereschenko" 
> <spf-discuss(_at_)spam(_dot_)24(_dot_)odessa(_dot_)ua> wrote:
> [...]
> > 3. One more. We do not change ISP. But our ISP willing to change IP
> > netblock they own OR simply change an IP of our server OR change IP
> > address of dial-up pool we used to send emails.
> > The same question - how to do this correctly ? Do we have to delegate our
> > DNS management in addition to server management to ISP ?
> > Or we must take such a change burden on ourself ?
> If you are using dialup lines with a dynamically assigned ip address,
> your ISP should publish a matching SPF record that you can include or
> redirect to in your own SPF record.
>
> If you have a static allocation, your ISP should notify you of any
> changes well ahead of time (at least one week, better two or more) so
> you can modify your DNS data accordingly.
This was my first response the the original post too. But it's a bit
more subtle. We are talking about the ip's of your ISP's outgoing mail
servers. If these change, there is (at least today) no real reason why
an ISP would inform you of this. Of course, tomorrow (read: when SPF is
widely implemented) ISP's should inform you of those changes.

Koen

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