At 09:55 PM 2/22/2005 +0000, you wrote:
On Tue, 22 Feb 2005, David MacQuigg wrote:
> How do you currently handle soft fails?
The information just gets added to the Received-SPF header; other than
that, I do nothing with it. I think TEMP-failing goes a bit too far; all
softfail really means is: "If I had my SPF records/setup in order, this
mail would probably have to be REJECT-ted; but since I am not done
configuring yet, please do not take this result too seriously." So, I
don't. :) As Stuart said, the Bayesian filter will then read and interpret
the Received-SPF header.
This will work, but perhaps with some difficulty. As long as you pass on
the essential information in a header ( protocol, IP address, domain-name,
result ), the receiver can figure out where to send the bounce, the
forwarder that gets the bounce can dig deeper into the headers and figure
out where to forward the bounce, etc. The difficulty comes when your
receiver does not understand the Received-SPF header, because it doesn't
implement SPF. A header with the items essential for any protocol in a
standard format would allow any receiver that follows the standard to
generate a bounce.
Are we in agreement that bounces may come *after* a forwarder's SMTP
session is closed? To repeat my earlier statement: A bounce might come as
late as several hours, when the recipient hits a "Reject as Spam"
button. That reject should be treated as a "bounce" and follow
authenticated addresses all the way back to its source.
-- Dave
************************************************************* *
* David MacQuigg, PhD * email: dmq at gain.com * *
* IC Design Engineer * phone: USA 520-721-4583 * * *
* Analog Design Methodologies * * *
* * 9320 East Mikelyn Lane * * *
* VRS Consulting, P.C. * Tucson, Arizona 85710 *
************************************************************* *
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