From owner-freebsd-questions@FreeBSD.ORG  Tue Mar 13 01:15:02 2007
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Date: Tue, 13 Mar 2007 01:14:58 +0000
From: RW <fbsd06@mlists.homeunix.com>
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Subject: Re: getting mail to work
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On Mon, 12 Mar 2007 16:36:41 -0800
jekillen <jekillen@prodigy.net> wrote:

> 
> On Mar 12, 2007, at 9:05 AM, RW wrote:
> 
> > The important thing is really your reverse DNS, if you have control
> > of it and looks like a real server name,  e.g. mail.example.com,
> > you can stay off the dynamic lists. It doesn't help to have a
> > static address if your reverse dns looks like 12-43-545-example.net
> >
> 
> Thank you for your reply;
> One of my machines (the one I use all the time and use to send and 
> receive
> e-mai)  does have an ISP assigned name. But the others are FQDN's that
> I have registered. One even has .net as the top level domain and that
> is one I am planning on using for the mail server.
>

Just as long as you understand the distinction between forward and
reverse DNS. Based on the whois record for for your IP address, at the
moment you appear to have the following reverse DNS for the address 
range 75.7.236.224 - 75.7.236.231:

$ for i in `jot  8 224` ; do dig +short -x 75.7.236.$i  ; done
adsl-75-7-236-224.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-225.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-226.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-227.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-228.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-229.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-230.dsl.irvnca.sbcglobal.net.
adsl-75-7-236-231.dsl.irvnca.sbcglobal.net.