1DKIM properties:
2- messages not signed
3- messages signed by the From: domain
4- messages signed by a parent domain
5- messages signed by some other domain
6
7SPF properties:
8- no "pass"
9- "pass" for From: domain
10- "pass" for parent of From: domain
11- "pass" for some other domain
12
13Organizational Domain computation:
14- various test cases (.com, .org.uk, etc.)
15
16DMARC policies, mixed with each of the above groupings:
17- p=none
18- p=quarantine
19- p=reject
20- sp=none
21- sp=quarantine
22- sp=reject
23- use "reject" and set "pct" to some value, ensure rejected message count is
24  in that ballpark
25
26REPORTING:
27- ensure correct output for each case above when HistoryFile is set
28