On Nov 18, 2005, at 8:38 AM, wayne wrote:
I recently posted the following comment to a circle-ID article:
For what it is worth, earlier this week I did a survey of 135k
domains
used in the SMTP HELO command. I found over 3750 domains with SPF
records at the HELO level, while I found only 24 CSV records.
(The
number of records is more than the number of domain owners
because
there are often several MTA hostnames per main domain name. For
example, the 24 CSV records were published by just 5 domain
owners. There were probably only 2500-3000 domain owners
publishing
SPF records, although some of those domains send a huge amount of
email.)
I realize that there hasn't been any traffic on this list for around
two months, but I thought I would give an update on my latest survey
of deployed CSV and SPF/HELO records.
Since August, CSV publication has increased from 24 domains to 26
domains. SPF records at the HELO domain have increased from ~3750 to
~4650. This survey was done *after* the MAAWG meeting where an entire
session was dedicated to CSV.
The full value that CSV offers can not be fully appreciated until
something like DKIM is in place. The desire then would be to offer
DoS protections within the name space. I suspect that as people
understand the nature of the problems being confronted, the low
overhead associated with CSV will make it more attractive. I could
be wrong, and time will tell. The concern is about ensuring a fair
system.
-Doug
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