Re: [Exim] Refuse connection if no MX for sending host

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Autor: Matthew Byng-Maddick
Datum:  
To: Exim Users Mailing List
Betreff: Re: [Exim] Refuse connection if no MX for sending host
On Thu, Oct 23, 2003 at 12:03:01PM -0400, Greg A. Woods wrote:
> [ On Thursday, October 23, 2003 at 16:15:59 (+0100), Tony Finch wrote: ]

[ >> greg snipped tony's attribution line, but greg wrote: ]
> > We do not support address
> > literals despite the requirement in RFC1123; you might think this is
> > evil bad and wrong, but I don't care.
> Yes, it is very evil, bad, wrong, and also a huge disservice to the
> community as a whole. Not supporting use of address literals is
> tantamount to not supporting <postmaster>, and in some cases it's
> exactly equivalent even.


Explain yourself.

> > We do not support email delivery
> > to arbitrary machines, and do not have to.
> What does that have to do with anything!?!?!?!?


I think you perhaps need to read some context here, rather than doing your
normal trick of jumping in with both feet to open your mouth and put them
in. Tony pointed out earlier that cam.ac.uk has an MX pointing to ppsw,
which expands to a number of A RRs. They don't have individual MXs, and
neither does the domain ppsw.cam.ac.uk, why should it?

> > > There _should_ always be an MX for every domain name that is a host name
> > > of a mailer, and the target name of the MX should be the same domain
> > > name:
> > Where does it say that?
> Before I answer that (because you're sure as heck not going to like the
> answer!), let me ask you this:
> Why the hell wouldn't you publish an MX for every mail server?!?!?!?!?


I think the question you wanted to ask would be better if it were correct:
``Why the hell wouldn't you publish an MX for every valid domain-part?''

I think your apparent inability to read and understand context, and to
understand Tony's question stems from your blinkered view to understand
this fundamental point. Why do you need an MX record for the canonical
hostname, if you don't accept that as a domain-part (note, this is not
the same thing as accepting unqualified postmaster)? So, the answer to
your above question is "because I don't want to accept mail for that
domain part". This is no doubt something you and your set ways cannot
even begin to comprehend, but this is the way that mail works on the
Internet.

So answer the original question you were asked, stop trying to evade it.

MBM

--
Matthew Byng-Maddick         <mbm@???>           http://colondot.net/