>I have a question on how to get a DMARC policy to work when some of my email
>is sent via blackberry BIS.

That's easy -- you can't.

DMARC policies can work well on domains whose mail is sent from a
single set of fixed sources.  They won't work at all on mail domains
with live people who invariably send mail in all sorts of different
ways that SPF and DKIM don't describe.

But it's still worth publishing a DMARC record with p=none to collect
the statistics.  That's what I do, and I find out all sorts of
interesting stuff.

Regards,
John Levine, [email protected], Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. http://jl.ly
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