On 3/22/12 10:05 AM, David F. Skoll wrote:
On Thu, 22 Mar 2012 13:55:50 +0000
Martin Gregorie<mar...@gregorie.org> wrote:
Disagreed. I don't believe SPF has cut backscatter down by
more than a few percentage points.
YMMV of course, but it worked for me: when I put up an SPF record
backscatter, which had been a problem at the time, was dramatically
reduced.
Hmm... OK. I may have been hasty. Assuming that the large providers
like Google, Hotmail, and Yahoo reject SPF-failing mail during the SMTP
transaction, I can see it making a measurable difference.
I still stand by my opinions about the lack of competence of most
Microsoft Exchange admins, though. :)
like ip/dns that is not 'round trip' consistent :-)
host colo3.roaringpenguin.com
colo3.roaringpenguin.com has address 70.38.112.54
host 70.38.112.54
54.112.38.70.in-addr.arpa domain name pointer roaringpenguin.com
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