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Re: [anti-spam-wg] Domains with MX set to localhost

  • From: der Mouse mouse@localhost
  • Date: Wed, 11 Jan 2006 12:55:08 -0500 (EST)

>> As I remarked upthread, an MX record isn't capable of containing
>> anything but a FQDN, so the second item must really mean something
>> else (like "in a nonexistent TLD").
> $ dig -t mx
>      8064    IN      MX      5 mail.
> # ping -ainet6 mail
> PING (::1): 56 data bytes

> So mx for points to the mailserver of whatever
> domain your machine is under as long as the hostname
> exist.

No, it doesn't.  It points to the (nonexistent) top-level doamin

It may be misinterpreted as being the machine "mail" in some domain or
other, depending on how carelessly it is handled (such as by stripping
the trailing dot and passing the rest to ping), but that is definitely
a *mis*interpretation.

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