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Date: Mon, 25 Mar 2013 07:03:54 +0200
From: Lena@lena.kiev.ua
To: freebsd-questions@freebsd.org
Subject: Re: Client Authentication
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Jerry <jerry@seibercom.net> wrote:

> > > How about refusing to
> > > relay mail from addresses in a good DNSBL?
> > 
> > Bad idea. Legitimate users connecting from dynamic IP-addresses is normal.
>
> I disagree. There is no legitimate reason a user cannot use a bonafide
> ISP to send mail.

The talk is about RELAYING mail sent with authentication
when legitimate users travel and connect from another ISP.
When you send mail from a mobile, should your relay (you use Gmail)
block you because you connected from a dynamic IP-address?