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On Thu, 2016-12-01 at 18:40 -0500, Matt Vernhout wrote:
> Also seeing a ton from this Mail From Domain:
> workexact.onmicrosoft.com

In November 2013, this was discussed here. At that time, I put in an
rpz/bind override such that (locally) *.onmicrosoft.com simply does not
exist. Of course that totally stopped that spam flow here. In the last
three years, we added 6 exceptions to that for various clients.

The logs for the last month don't show any mail here from
*.onmicrosoft.com. It looks like MS managed to stop that leak.


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