Michael Thomas wrote:
1) The benefits in general
Consolidation of multiple domains to a single key record. Useful when
contracting out signing, wouldn't you think?
2) The security implications of the base DKIM mechanism (ie, is the
model still correct, what about key rollover, etc, etc).
You own the domain. If you CNAME over to somebody else you're trusting
3) The unintended security implications (loops, dos, amplification...)
Dunno. Mark's points apply.
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