On Mon, 11 Dec 2006, Matthias Keller wrote:

> > I'm curious.. as someone who ALSO runs a home mail server...
> >
> > What's wrong with evolving best practices to require that our outgoing 
> > email be channeled through our ISP's mail server, instead of having 
> > our customer-assigned IP addresses directly connect to other people's 
> > mail servers?
>
> And forcing users to use their ISP's mail server efficively defeats SPF

How so?

I'm assuming a home business owner owns and uses their own domain and
has the ability to set up SPF records for that domain. If you are
routing your outbound mail via your ISP's MTAs, just grab your ISP's
SPF record and use it for your domain. If your ISP is doing SPF checks
you might need to talk to their MTA via SMTP AUTH to bypass that test.

--
 John Hardin KA7OHZ                    http://www.impsec.org/~jhardin/
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