Diff two address lists?

[Jonesy]

On Fri, 27 Jul 2012 20:08:22 -0700, Patton wrote:
> I have a need to compare two lists of email addresses.  Each one is a 
> text file with address per line.  What I need to output is a list of 
> email addresses that are only in list B, I do not want the addresses 
> that are in both or are only in A.

 _IF_ (big "if") the two lists are pure email addys with no further 
embellishments/contents, something viz:

    grep -v -f "B"_file "A"_file

Or, maybe I'm rong.  Haven't had my coffee yet....

Jonesy
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