In late May and late June, I conducted surveys of a list of 1.3
million email domains found in a spammer's list. Yesterday, I ran
another survey to see how things have progressed.
There was a net increase of 5729 domains with SPF records, a 68.5%
increase in the last three months. SPF records are by far the most
common type of TXT record usage, and if trends continue, SPF records
will represent over half of all TXT records atthe domain level by
early next year.
1289260 total domain names (same as last time)
39205 total TXT records found (some domains have more than one)
14089 have SPF records -> 35.9% of all domain level TXT records are
spf records.
34932 domains have txt records
99702 spf_domains adoption roll
Earlier stats as a reference:
In <x48yedh0b3(_dot_)fsf(_at_)footbone(_dot_)midwestcs(_dot_)com> wayne
<wayne(_at_)midwestcs(_dot_)com> writes:
1289260 total domain names (same as last time)
35115 total TXT records found (some domains have more than one)
8360 have SPF records -> 23.8% of all domain level TXT records are
spf records.
26359 domains have txt records
18968 spf_domains adoption roll
87 have Caller-ID records
Last months stats as a reference:
In <x4wu35ml3v(_dot_)fsf(_at_)footbone(_dot_)midwestcs(_dot_)com> wayne
<wayne(_at_)midwestcs(_dot_)com> writes:
1289260 total domain names
33016 total TXT records found (some domains have more than one)
6320 have SPF records -> 19.1% of all domain level TXT records are
spf records
26359 domains have txt records
6315 domains have spf records
1456 domains found that were also in the adopt roll -> 23.0%
14192 spf_domains adoption roll
61554 estimated domains have SPF records. (This probably misses
most parked domains, of which I have heard rumors that there
are a least a couple hundred thousand with SPF records.
82 have Caller-ID records
57 have both Caller-ID records and SPF records
45 have "testing=true" in the C-ID records.
25 have C-ID records only, of which three (10%) are microsoft.com,
exchange.microsoft.com and hotmail.com