The End-To-End Internet (was Re: Blocking MX query)
johnl at iecc.com
Wed Sep 5 23:07:07 UTC 2012
>Well, if you've got proper forward and reverse DNS, and your portable
>SMTP server identifies itself properly, and you are using networks that
>don't filter outbound port 25, AND you have DKIM configured correctly
>and aren't using it for a situation for which it is inappropriate, then
>you'll get the same results with a portable SMTP server that you would
>sending through a properly configured static server.
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.
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