Mandatory? I'm googling, but can't find a document that declares it mandatory and only sendmail seems to do it. I think it is lame to use DNS info to rewrite e-mail addresses, but the person who made it 'mandatory' will have good reasons for it.

Does somebody have a pointer to the specs about this?

Ronald.

On Fri, 27 Aug 2010 10:21:27 +0200, Mark Andrews <[email protected]> wrote:


In message <[email protected]>, "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

r...@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 <[email protected]> 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 <[email protected]>
> To: <[email protected]>
>
> 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 -----
> <[email protected]>
>
>    ----- Transcript of session follows -----
> ... while talking to thuis.klop.ws.:
>>>> RCPT To:<[email protected]>
> <<< 554 5.7.1 <[email protected]>: Relay access denied
> 554 <[email protected]>... Service unavailable
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