Author: Michael Scott Shappe Date: To: bugs, exim-users Subject: Re: [Exim] Lousy error message when verify = header_sender fails
> $ dnsmx gigigaga.net > [...~20 sec wait...]
> dnsmx: fatal: unable to find MX records for gigigaga.net: temporary failure
>
> and the "host" program from BIND (bind-utils-9.2.1 on a Red Hat Linux
> 6.2 box):
>
> $ host -t mx gigigaga.net
> Host gigigaga.net not found: 2(SERVFAIL)
>
> Presumably one of those makes sense to someone who understands DNS. ;-)
Yup. Actually, it's pretty straightforward: gigigaga.net might actually
exist (WHOIS says it does, in fact), but no server willing to tell you about
it answered the query. This is considered a temporary failure, because the
nature of the Net is that this kind of thing happens to the most legitimate
of domains, as well as the least -- every now and then, both primary and
secondary sources for a domain will be off the air.
