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Re: [spf-discuss] SPF TXT Questions re Effectiveness

2006-12-01 10:10:02
On 1-Dec-06, at 11:46 AM, George Hitz wrote:

    Mea culpa on the wrong IP.  Thanks for the clarification.
    (that's a real 'duuuuuh')

    I see that comcast.net has no SPF TXT file but that
    gmail.com (my MTA/POP source) does have one - namely:

    "v=spf1 redirect=_spf.google.com"

    What does this do? and is it of any value to me?

    George

The 'redirect' parameter redirects all queries to the named domain, in this case '_spf.google.com'. This one results in:

_spf.google.com. IN TXT "v=spf1 ip4:216.239.56.0/23 ip4:64.233.160.0/19 ip4:66.249.80.0/20 ip4:72.14.192.0/18 ?all"

It's a good way of managing SPF for multiple domains. You only have to make changes in one record and it will be used by all the other domains that redirect to it.

Whether it's of value to you is up to you. I guess it depends on your understanding of its use which I hope I've cleared up for you.

--
Gino Cerullo

Pixel Point Studios
21 Chesham Drive
Toronto, ON  M3M 1W6

416-247-7740

This email address protect by SPF! Want to protect your domain's email from forgery? Visit openspf.org


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