nanog mailing list archives

Re: The End-To-End Internet (was Re: Blocking MX query)


From: Izaac <izaac () setec org>
Date: Wed, 5 Sep 2012 11:11:27 -0400

On Wed, Sep 05, 2012 at 07:50:12AM -0700, Henry Stryker wrote:
Not only that, but a majority of spam I receive lately has a valid DKIM
signature.  They are adaptive, like cockroaches.

This is why tcp port 25 filtering is totally effective and will remain so
forever.  Definitely worth breaking basic function principles of a
global communications network over which trillions of dollars of commerce
occur.

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