Here's some data that might be helpful to consider.
Data comprises about a year of reports for one domain.
229 reporting organizations
derived from 369 distinct <org_name> strings
---+---
20 use Organization Name ("Example")
161 use Organizational Domain only ("example.net")
48 use Hostnames ("mx1.example.net", ...)
with min=1, median=1.0, mean=3.92, max=116 distinct hostnames
---+---
193 report version
0 report meta_error
227 report sp
179 report sp__empty
20 report fo__v1
0 report fo__v1empty
6 report override_reason
12 report envelope_to
191 report envelope_from__v1
41 report envelope_from__v1empty
6 report envelope_from__v1missing
0 report dkim_selector__empty
25 report dkim_selector__missing
7 report dkim_result__none
10 report dkim_human_result
9 report dkim_human_result__copy
191 report spf_scope__v1
Human-comprehensible result:
- 84% (193/229) of reporters announce the use of the RFC 7489
<version>1.0</version> schema.
- No one uses <error> below <report_metadata>.
- 78% (179/229) report an empty <sp></sp> instead of the default value.
- 10% (20/193) of 1.0 reporters include the <fo> element, although it's
actually mandatory. Draft schema does not have <fo>.
<identifiers>:
- 5% (12/229) use <envelope_to>.
- 99% (191/193) of 1.0 reporters use <envelope_from>. Draft schema does
not have <envelope_from>.
- 21% (41/193) have used an empty <envelope_from> (i.e., reported a
bounce) at least once.
- 3% (6/193) have omitted <envelope_from> at least once, even though
it is mandatory in 1.0.
- The remaining 75% either did not receive a bounce or do not report
bounces.
<dkim>:
- 11% (25/229) have omitted the optional <selector> in a DKIM result.
- 3% (7/229) have reported a DKIM <result>none</result>, even though
they could've instead omit the <dkim> element altogether.
- 4% (10/229) have used the <dkim_human_result>, but only 1 used it
for extra information that was not just a copy of <result>.
Regards,
Matt
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