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

valdis.kletnieks at vt.edu valdis.kletnieks at vt.edu
Wed Sep 5 18:42:24 CDT 2012


On 05 Sep 2012 23:07:07 -0000, "John Levine" said:
> Not really.  Large mail system like Gmail and Yahoo have a pretty good
> map of the IPv4 address space.  If you're sending from a residential
> DSL or cable modem range, they'll likely reject any mail you send
> directly no matter what you do.

Which is why I finally gave up and speak to an 800 pound gorilla on port 587,
because nobody dares to mess with that gorilla's port 587 so  my laptop can
always get mail sent. :)
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