out of place mx records.
Tony Finch
dot at dotat.at
Fri Oct 29 16:01:59 UTC 2010
On Fri, 29 Oct 2010, Mark Andrews wrote:
>
> It would be nice if we could standardise a MX target of "." as saying
> that this domain doesn't accept email e.g. "MX 0 ." the same way as "SRV
> 0 0 0 ." means that there is no service for the named protocol. That
> way the sending MTA or the MSA can reject the email.
Yup. Many MTAs already implement this.
> Every time it get suggested people shoot it down worrying about
> private nets that have addresses at "." or get worried about thousands
> of machines making A/AAAA queries for "." where the MTA doesn't
> check that the MX target is a valid host name.
Sigh.
Tony.
--
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