[ietf-dkim] Are lookalike domains like parent domains?

[John Levine]

> Assume, say, one million people who regularly receive valid emails
> from their bank (info at accounts.bigbank.com). If they received an email
> from info at mail.account.bigbank.com, how many of them would believe the
> email is really from the bank?

Well, now we have another question -- who's going to be using ADSP, mail 
system operators or end users?  It's always been my impression that the 
main audience is MTA operators, who will use it in filtering decisions.

If it's for end users, my experience says that they are equally likely to 
be fooled by info at accounts-bigbank.com, which would suggest we've been 
wasting our time.

R's,
John

PS: You don't have to tell me that this is not a new argument.  But it's 
evidently not one we've resolved.