Can you give me a pointer to this survey that you are referring to?
Can you explain the differences between the 2% you quote and the 36% I
found?
Attached you will find a survey that Marcos Sanz and I did of com, net,
and de.
We did look at every domain but we did sample a statistically
significant number of them.
I'll reserve my conclusions for now, save the fact that your numbers
depend on where you look.
-andy
com/net de
MX Reocrds 7,617,555
1,164,17
MX Records With Address In Target 63,797
521
MX Records With Unresolvable Targets 358,369
13,324
MX Records Pointing To Loopback Address 125,956
949
MX Records At Zone Apex 6,949,466
1,119,31
Wildcard MX Record 668,089
44,861
Unique MX Record by IP Address 2,264,858
196,545
TXT Records 407,961
17,850
Wildcard TXT Record 25,669
187
TXT Records at Zone Apex 356,537
17,474
CNAME'd TXT Records at Zone Apex 248
4
TXT with SPF Content 185,607
2,304
TXT with Caller-ID Content 137
2
TXT with _ep Prefix 25,755
189
TXT with _ep Prefix and No Caller-ID Content 25,624
187
TXT with _ep Prefix and Caller-ID Content 131
2
TXT with _ep Prefix and SPF Content 24,368
156
Wildcard TXT with SPF Content 24,378
156
Wildcard TXT with Caller-ID Content 0
0
TXT at Zone Apex with SPF Content 136,861
1,992
TXT at Zone Apex with Caller-ID Content 6
0
Average Size of All TXT Records 39
21
Avearge Size of All Wildcard TXT Records 12
27
Average Size of All Apex TXT Recrods 43
21
Average Size of All SPF Records 56
27
Average Size of All Caller-ID Records 82
76
Largest TXT Record 423
232
Largest SPF Record 386
232
Largest Caller-ID Record 249
96
Total Number of Domains Scanned 8,477,489
736,725
Domains with A Record at Zone Apex 5,574,982
503,652
Domains with A Record at Apex Pointing to Loopba 867
269
Domains with AAAA Record at Zone Apex 2,284
58
Domains with Address in MX Record 62,513
499
Domains with Unresolvable MX Target 226,673
12,497
Domains with MX Pointing to Loopback Address 86,344
915
Domains with MX Record at Zone Apex 4,697,344
676,517
Domains with TXT Record at Zone Apex 329,707
15,071
Domains with Wildcard MX Record 437,982
26,616
Domains with Wildcard TXT Record 25,619
186
Domains with Apex MX and Wildcard MX 418,547
26,443
Domains with Apex TXT and Wildcard TXT 24,531
181
Domains with SPF 138,603
1,993
Domains with Caller-ID 136
2
Domains with both SPF and Caller-ID 107
1
Domains with SPF and Wildcard TXT 24,378
156
Domains with SPF in Wildcard TXT 24,378
156
Domains with SPF and Wildcard TXT but not Both 0
0
Domains with SPF and Other Content in Wildcard T 4
0
Domains with SPF at Zone Apex 136,853
1,991
Domains with SPF '+all' 7
0
Domains with SPF '-all' 76,386
571
Domains with SPF '?all' 51,005
105
Domains with SPF '~all' 10,351
96
Domains with Caller-ID and Wildcard TXT 26
0
Domains with Caller-ID in Wildcard TXT 0
0
Domains with Caller-ID and Wildcard TXT but not 26
0
Domains with Caller-ID and Other Content in Wild 0
0
Domains with a valid A or MX at the Apex 6,104,870
693,109
Domains with a valid A or MX at the Apex and SPF 130,464
1,926
Domains with a valid A or MX at the Apex and Cal 121
2
Average Size of Wildcard TXT for Domains with Wi 12
27
Average Size of Apex TXT for Domains with Apex T 43
20
Total Number of Domains In Zone(s) 33,887,010
5,896,72
Total Number of Domains Processed 8,477,489
736,725