Re: by the numbers

> Attached you will find a survey that Marcos Sanz and I did of com,
> net, and de.


I've had a couple of requests for more raw data about what TXT records
are out there and SPF records in particular.  So, I've finished up a
couple of surveys and lightly munged the data to keep spammers from
collecting domain names.  You can find the raw data at:

http://www.midwestcs.com/spf/surveys/

The "spammerlist" files are the domains found in a spammers list of
email addresses.  There were about 1.3 million unqiue domain names
used by the spammer.  The list was old when I got it about a year and
a half ago and the spammer never bothered to clean up obviously bogus
domain names, so the actual number of valid domain names is much less
than 1.3 million, maybe as few as 500k.  I have not bothered to clean
up the list because I use it for testing SPF stuff.  Even if the email
addresses have bogus domains, I expect spammers to send email claiming
to be from them so I need to make sure that my SPF system can deal
with them.

Files ending in "spf" are the unique SPF records found.  Files ending
in "txt" are summaries of the TXT records found.


Let me know if you have questions.


-wayne