Quoting Eric Davis ([EMAIL PROTECTED]):
> >
> > Qmail will bounce a recipient only if both MX and X lookups fail with an
> > NXDOMAIN error, indicating a permanent failure of the DNS lookup.
> >
> > If there's any other outcome - no response from the DNS server, or any
> > other error - it is interpreted as a transient error, and mail is not
> > bounced, but rescheduled for another delivery attempt.
> >
> > That's the way it should be.
> >
> > --
> > Sam
>
> The domain in question is something like <address>@hotmial.com or any
> other varient that we know is not a real domain. (The biggest one we
> see is <address>@aol .com or any variation there of) Why do these
> addresses not bounce right away since their is no DNS server for them?
They do, that's the point.
; <<>> DiG 8.2 <<>> ns hotmial.com
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
;; QUERY SECTION:
;; hotmial.com, type = NS, class = IN
;; ANSWER SECTION:
hotmial.com. 2D IN NS SELENITE.TZC.COM.
hotmial.com. 2D IN NS OBSIDIAN.TZC.COM.
;; ADDITIONAL SECTION:
SELENITE.TZC.COM. 2D IN A 207.229.32.7
OBSIDIAN.TZC.COM. 2D IN A 207.229.32.6
