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Re: [dkim-ops] subdomain vs. cousin domain (when deploying"discardable")

2010-09-09 13:37:22
Just to be clear, change to our non-discardable domain is not going to be 
particularly painful.  I and a few colleagues are "piloting" paypal-inc.com.  
We knew that some trial and error (and debate) was in order before rolling it 
out across the company.

But if we pick a domain that is entirely unrecognizable as being from "us", 
that might be a harder sell within the company than paypal-inc.com (especially 
since yahoo already operates yahoo-inc and has for a long time).

-- Brett

On Sep 9, 2010, at 2:15 PM, Douglas Otis wrote:

 On 9/9/10 9:51 AM, McDowell, Brett wrote:
Mike, I appreciate all the comments you shared in your last response.  I'm 
replying to only one of them because I think this may be the consensus "best 
practice" I was looking for.

On Sep 9, 2010, at 12:36 PM, MH Michael Hammer (5304) wrote:

The general rule would be to use a different domain that is
far enough from the transactional/brand domain that the risk of use for
enduser phishing is mitigated.
Does everyone agree that this is the "best practice" for the use case 
provided (ignoring I only gave you two namespace options)?

Brett,

Until more comprehensive policy becomes available, yes.

In general, using a cousin domain is a bad practice, where the term 
"far" has not been met by your current practice.  It may have been 
better to have used something like your stock symbol instead.  Such a 
change will be painful, and likely of little benefit, since users will 
have been exposed to spoofing to a point where they should be wary of 
cousin domains.  Then again, there is always the next generation to 
consider, assuming they will still be using email.

-Doug
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