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data point: SPF is used over 500 times as much as SenderID

2004-11-29 14:16:45


Mike Elliot of MSen.com sent me some data about SPF usages vs SenderID
usage.

Mike published the following records for MSen.com

msen.com.  TXT  "v=spf1 a mx include:mx.msen.com include:log.msen.com -all"
log.msen.com.  TXT "v=spf1 +exists:%{l}.%{o}._spf.msen.net 
exists:I.%{i}.F.%{s}.H.%{h}._spf.msen.net -all"

msen.com.  TXT  "spf2.0/pra -exists:praI.%{i}.F.%{s}.H.%{h}._spf.msen.net ?all"


So, with these tracking exists: mechanisms, he has been able to
determine how often people are using his SPF records and how often
they are using his SenderID records.


Over a ten day period, he found only 2 hosts checking the SenderID
record, but 1082 hosts that were checking SPF records, over a factor
of 500 more.  The number of queries were, not surprisingly, about a
factor of 500 more for SPF also.


Interesting data.  Not a very large survey, but still more data than
is generally published in whitepapers or presented in summits.


-wayne




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