We've received a quantity of junk impersonating good domains - not sure how to handle it.

An example: efax.com SPF record

v=spf1 mx include:_spf.salesforce.com -all

So they're depending on salesforce.  Ok...what do they have?

v=spf1 include:_spf.google.com include:_spf.salesforce.com include:spf.mandrillapp.com exists:%{i}._spf.corp.salesforce.com ~all

Now they check against google before their own, ok...

It just goes on and on.  But the initial failure:
Maximum void DNS look-ups limit (2) exceeded.

Google is probably at fault - but as usual the biggest guy around gets to do what they want.

Is there a way of accommodating these nonsense configs to still use them to block impersonators?
--
Daniel


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