[rwmj]

The real solution is political.

If people are bribing insiders at Yahoo to whitelist email servers in Las Vegas, why aren't the insiders and the spammers all in prison?

[true_religion]

It's not illegal to bribe people inside private institutions.

[sk5t]

One may imagine most bribe recipients don't report their bribes (or value of non-cash consideration) to the IRS...