is bind needed at all?

[Everton da Silva Marques]

Will Yardley wrote:
>
> Chris Thomas wrote:
> > Use of MX records is also a performance issue.  If you omit an MX record

> > for A record site that receives mail, you force senders to make a
useless 
> > MX query to the receiving nameserver before requesting the A record, 
> > which may be (is probably) cached locally to the sender.  (Name servers 
> > that cache the non-existance of MX records mitagate this.)
>
> although to be fair, i believe in actual practice, most mail servers,
> including sendmail, make the first query for records of type 'ANY' not
> for an 'MX' specifically, even though in an ideal world, they would
> probably query for an MX first.  i think it's more efficient to just
> query for ANY in the first place.

A quick-and-dirty inspection of Postfix and Sendmail seems to indicate
otherwise: