On Mar 29, 2013, at 10:29 AM, Franck Martin <[email protected]> wrote:

> 
> 
> On 3/29/13 10:18 AM, "Steve Atkins" <[email protected]> wrote:
> 
>> 
>> On Mar 29, 2013, at 10:01 AM, Franck Martin <[email protected]> wrote:
>> 
>>> I'd like to point to two DMARC records:
>>> http://www.dmarcian.com/dmarc-inspector/google.com
>>> http://www.dmarcian.com/dmarc-inspector/linkedin.com
>>> 
>>> These are domains with humans behind the domain. So it can be done, it
>>> is
>>> not too hard, but it is not mainstream (yet)(the spec is only one year
>>> old!) and as Mike points out, do it only if you have a phishing problem.
>> 
>> How does that work for, for example, the mail I'm replying to?
>> 
>> It was DKIM signed with d=linkedin.com, but the body hash has changed
>> since it was signed, so it presumably fails DKIM. I'm guessing
>> blackops.org
>> isn't in linkedins SPF record.
>> 
>> I'm not checking DMARC, but wouldn't this mail be rejected according to
>> your DMARC policy if I were? (I'd presume not, or you wouldn't have set
>> things up this way, but what am I missing?)
>> 
> 
> http://www.dmarc.org/faq.html#r_2
> http://www.dmarc.org/faq.html#s_3
> https://code.launchpad.net/~mlm-author/mailman/2.1-author
> 
> Don't forget as a receiver you can always overwrite the DMARC disposition
> for stuff you strongly care about.

I think that means that if I had implemented DMARC checking then, yes, I
would have rejected your mail?

Cheers,
  Steve
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