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Re: FORMS, validating mail was sent [message #181950 is a reply to message #181948]

Thu, 27 June 2013 19:13

Thomas 'PointedEars'
Messages: 701
Registered: October 2010

Karma:

Senior Member

Gordon Burditt wrote:

>> Utter nonsense. An (standards-compliant) “MX” or “A” DNS record *never*
>> points to 127.0.0.1. In particular, an MX record never has an IP address
>> as its value, as I have already pointed out.
>
> You expect spammers, vandals, and viruses to generate standards-compliant
> DNS?

No, you are very confused.

> [non sequitur]
> An MX record is not supposed to have an IP address as it's value,

More, the value of an MX record is never interpreted as an IP address in the
first place, the same as the value of a CNAME record is never interpreted as
an IP address by any DNS client implementation that is not FUBAR.

> but there is a good chance that if it does (for the destination
> address) a good fraction of the mail will be delivered anyway.

Pray tell, which host will the mail be delivered to if it cannot be resolved
in the first place?

> […]
>> 127.0.0.1 is specified at most in the local host file, and resolving a
>
> There's nothing wrong with including "localhost" in a nameserver for
> a local LAN.

Depends.

>> domain name of a supposed e-mail address will *never* result in
>> 127.0.0.1.
>
> You're wrong, unless you're going to use the "(standards-compliant)"
> dodge.

It is no dodge, it is both the standard *and* the *implementation* of DNS.

> Some people don't know you shouldn't put IP addresses in MX records,
> especially those where it seems to work.

“Seems” is correct, because MX 127.0.0.1 is equivalent to 127.0.0.1.$ZONE,
_not_ to 127.0.0.1.

PointedEars
--
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evangelism: XHTML 1.0 Strict
madness: XHTML 1.1 as application/xhtml+xml
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[Message index]

		FORMS, validating mail was sent By: bill on Thu, 20 June 2013 17:40
		Re: FORMS, validating mail was sent By: Jerry Stuckle on Thu, 20 June 2013 17:53
		Re: FORMS, validating mail was sent By: J.O. Aho on Thu, 20 June 2013 18:18
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Thu, 20 June 2013 18:24
		Re: FORMS, validating mail was sent By: Jerry Stuckle on Thu, 20 June 2013 18:40
		Re: FORMS, validating mail was sent By: gordonb.vb4vo on Thu, 20 June 2013 19:44
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Thu, 20 June 2013 21:03
		Re: FORMS, validating mail was sent By: bill on Fri, 21 June 2013 18:06
		Re: FORMS, validating mail was sent By: bill on Sat, 22 June 2013 15:42
		Re: FORMS, validating mail was sent By: Thomas 'PointedEars' on Sun, 23 June 2013 11:13
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Sun, 23 June 2013 11:22
		Re: FORMS, validating mail was sent By: bill on Sun, 23 June 2013 17:07
		Re: FORMS, validating mail was sent By: bill on Sun, 23 June 2013 17:00
		Re: FORMS, validating mail was sent By: J.O. Aho on Sun, 23 June 2013 18:22
		Re: FORMS, validating mail was sent By: bill on Sun, 23 June 2013 18:53
		Re: FORMS, validating mail was sent By: gordonb.4qaft on Mon, 24 June 2013 19:43
		Re: FORMS, validating mail was sent By: Peter H. Coffin on Mon, 24 June 2013 20:09
		Re: FORMS, validating mail was sent By: Thomas 'PointedEars' on Tue, 25 June 2013 13:19
		Re: FORMS, validating mail was sent By: Jerry Stuckle on Tue, 25 June 2013 14:11
		Re: FORMS, validating mail was sent By: bill on Tue, 25 June 2013 15:43
		Re: FORMS, validating mail was sent By: bill on Tue, 25 June 2013 15:32
		Re: FORMS, validating mail was sent By: gordonb.htsnc on Thu, 27 June 2013 15:57
		Re: FORMS, validating mail was sent By: Thomas 'PointedEars' on Thu, 27 June 2013 19:13
		Re: FORMS, validating mail was sent By: Arno Welzel on Fri, 28 June 2013 09:43
		Re: FORMS, validating mail was sent By: gordonb.k0cb7 on Thu, 20 June 2013 20:46
		Re: FORMS, validating mail was sent By: Jerry Stuckle on Thu, 20 June 2013 21:03
		Re: FORMS, validating mail was sent By: gordonb.udxst on Sat, 22 June 2013 00:26
		Re: FORMS, validating mail was sent By: Jerry Stuckle on Sat, 22 June 2013 00:36
		Re: FORMS, validating mail was sent By: bill on Sat, 22 June 2013 16:04
		Re: FORMS, validating mail was sent By: Christoph Michael Bec on Thu, 20 June 2013 21:39
		Re: FORMS, validating mail was sent By: Tim Streater on Fri, 21 June 2013 09:11
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Fri, 21 June 2013 10:25
		Re: FORMS, validating mail was sent By: Tim Streater on Fri, 21 June 2013 11:27
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Fri, 21 June 2013 16:59
		Re: FORMS, validating mail was sent By: Tim Streater on Fri, 21 June 2013 17:25
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Fri, 21 June 2013 22:43
		Re: FORMS, validating mail was sent By: Tim Streater on Sat, 22 June 2013 12:45
		Re: FORMS, validating mail was sent By: bill on Sat, 22 June 2013 16:20
		Re: FORMS, validating mail was sent By: Peter H. Coffin on Thu, 20 June 2013 22:27
		Re: FORMS, validating mail was sent By: The Natural Philosoph on Fri, 21 June 2013 06:57
		Re: FORMS, validating mail was sent By: bill on Sat, 22 June 2013 16:02
		Re: FORMS, validating mail was sent By: GravyCode on Fri, 21 June 2013 18:30

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