spf-discuss
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RE: SPF in a Shared Hosting Environment (non-ISP) -> "Whitelisting only" records

2004-08-03 13:09:50
-----Original Message-----
From: owner-spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
[mailto:owner-spf-discuss(_at_)v2(_dot_)listbox(_dot_)com]On Behalf Of Meng 
Weng Wong
Sent: Tuesday, August 03, 2004 3:53 PM
To: spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
Subject: Re: [spf-discuss] SPF in a Shared Hosting Environment (non-ISP)
-> "Whitelisting only" records

If isp.com has an SPF record, the above web page will
prefill the SPF record with "include:isp.com".

if isp.com does not have an SPF record, the above web page
will prefill the SPF record with "ptr:isp.com".

Wouldn't that mean that ANY computer in isp.com, such as
host157-139.pool8252.isp.com (that is any trojaned box with a broadband
connection that uses that isp?

Wouldn't "?ptr:isp.com" make a lot more sense?

An alternative is to send several messages to yourself and see what IPs they
are using for mail servers and then use ip4: to try and narrow the field.

Scott Kitterman