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Re: Changing the default for `send-mail-function'

From: Jason Rumney
Subject: Re: Changing the default for `send-mail-function'
Date: Mon, 27 Jun 2011 22:51:34 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Lars Magne Ingebrigtsen <address@hidden> writes:

> How does that work?  Typically users are running behind a NAT firewall
> these days, aren't they?  So you can use the local IP address to find
> out what ISP you're in.

I think it uses the domain part of the email address, not the IP address
of the local machine.  Users generally know their email address, even if
they do not know their SMTP server.

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