Smarthost Failover - WAS RE: [Mimedefang] SMTP mailertable qu estion

[Justin]

On Wed, 7 Jan 2004, Cormack, Ken wrote:
> >At a guess, enclosing hostnames in []'s would eliminate that- if you're
> >relaying mail for something, for instance, you may want to explicitly
> >specify a destination hostname rather than allowing sendmail to try an
> >MX lookup on that name.
>
> Enclosing the hostnames in brackets would not work.  The function of the
> brackets is to signify to sendmail that the enclosed entity is a
> litteral IP address not requiring lookups of any kind (as opposed to a
> "name" of some sort, against which MX and/or PTR lookups are needed.)
> This is mentioned in other contexts, in the sendmail litterature.

In some cases, i.e. mailertable file, brackets are meant to be used to
signify no MX lookup on a hostname. Conceivable that this could be used
other places as well.

Though I do not know whether or not it would work in this case.

-Justin