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Date:      Fri, 27 Aug 2010 18:21:27 +1000
From:      Mark Andrews <marka@isc.org>
To:        "Ronald Klop" <ronald-freebsd8@klop.yi.org>
Cc:        freebsd-stable@freebsd.org, Andriy Gapon <avg@icyb.net.ua>
Subject:   Re: cname replace in mail address? [off-topic] (Re: Attn Ronald Klop)
Message-ID:  <20100827082128.07538364425@drugs.dv.isc.org>
In-Reply-To: Your message of "Fri, 27 Aug 2010 10:03:52 %2B0200." <op.vh27cqoy8527sy@212-123-145-58.ip.telfort.nl>
References:  <4C74261A.4000401@icyb.net.ua><op.vh27cqoy8527sy@212-123-145-58.ip.telfort.nl>

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In message <op.vh27cqoy8527sy@212-123-145-58.ip.telfort.nl>, "Ronald Klop" writ
es:
> offtopic, but why do some mailers replace a CNAME in a mail-address?

Because it used to be manditory to do so.  If you don't want it to
be done use a MX record.

	klop.yi.org MX 0 thuis.klop.ws

If you need klop.yi.org to have a address record then give it one.

	klop.yi.org A 212.123.145.58

Mark

> root@sheeva2:/var/vmail# host klop.yi.org
> klop.yi.org             CNAME   thuis.klop.ws
> thuis.klop.ws           A       212.123.145.58
> 
> It is not the first time that I'm bitten by this, but I never understood =
> =20
> it.
> 
> Ronald.
> 
> On Tue, 24 Aug 2010 22:05:46 +0200, Andriy Gapon <avg@icyb.net.ua> wrote:
> 
> >
> > Ronald,
> >
> > your email address bounces, that's inconvenient.
> >
> >
> > -------- Original Message --------
> > Subject: Returned mail: Service unavailable
> > Date: Tue, 24 Aug 2010 23:03:33 +0300 (EEST)
> > From: Mail Delivery Subsystem <MAILER-DAEMON@citadel.icyb.net.ua>
> > To: <avg@icyb.net.ua>
> >
> > The original message was received at Tue, 24 Aug 2010 23:03:27 +0300 =20
> > (EEST)
> > from porto-e.starpoint.kiev.ua [212.40.38.100]
> >
> >    ----- The following addresses had permanent fatal errors -----
> > <ronald-freebsd8@thuis.klop.ws>
> >
> >    ----- Transcript of session follows -----
> > ... while talking to thuis.klop.ws.:
> >>>> RCPT To:<ronald-freebsd8@thuis.klop.ws>
> > <<< 554 5.7.1 <ronald-freebsd8@thuis.klop.ws>: Relay access denied
> > 554 <ronald-freebsd8@thuis.klop.ws>... Service unavailable
> _______________________________________________
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org



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