On Wednesday 29 June 2016 at 17:38:35, Shivram Krishnan wrote:

> There has been enough research which has been done in this field were the
> authors have obtained the data from network operators. This
> <http://repository.upenn.edu/cgi/viewcontent.cgi?article=1962&context=cis_r
> eports> for instance is a paper from UPenn, which has collected over 31
> million Mail Headers (not only IP address) to validate their method.

Page 6:

"For testing purposes, we procured approximately 31 million email headers 
collected at the University of Pennsylvania engineering email servers..."

So, I repeat the suggestion from my previous reply - go and ask your own 
university's mail admins.


Antony.

-- 
Behind the counter a boy with a shaven head stared vacantly into space,
a dozen spikes of microsoft protruding from the socket behind his ear.

 - William Gibson, Neuromancer (1984)

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