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Re: relaying to host with no MX?
On Tue, Jun 20, 2000 at 09:16:16AM -0500, Enrique Vadillo wrote:
> Hi all,
> I'm using ZMailer 2.99.50-s5 on sparc, i would like to know how i can
> relay mail to a target host without any MX record, see, i am trying to spare
> any SMTP inbound activity to my sparc box, i simply want to create many
> MX records pointed to my ZMailer relays, and from there i want to force
> those mail messages onto the right box, MX records would be as follows:
> dialup.domain.com MX 10 zmailer1.domain.com.
> MX 10 zmailer2.domain.com.
> MX 10 zmailer3.domain.com.
> MX 10 zmailer4.domain.com.
> this is the way i want it to be, i want to know how i can force queued
> mail targeted to @dialup.domain.com from my ZMailer relays, maybe i have
> to use some greater MX anyway? what is the best method i can use?
I would use a bit different setup:
dialup.domain.com. MX 1 smtpmx.domain.com.
smtpmx.domain.com. IN A 126.96.36.199
IN A 188.8.131.52
IN A 184.108.40.206
The DNS reply will be smaller, if nothing else ;)
Presuming all servers are of equal preferrence, that is.
You propably want to use $MAILBAR/db/routes database to
drive routing by domain, e.g.:
Of course if you don't have primary MX into the final target
machine, you must offset it with explicite manual configuration
at your MX servers.
"Force the queued email" ? Hmm.. Perhaps current system's
smtpserver/scheduler ETRN-cluster mechanism could help too ?
Sort of relating to this:
I have just been playing with pathologically large MX sets, and at
least the smtp TA can handle them now; smtpserver policy code, and
router bind subset don't yet.. do: "dig mx bigmx.zmailer.org."
(aka "nslookup -q=mx bigmx.zmailer.org")
You should see 100 MX entries. I said pathological, didn't I ?
Hmm.. I didn't quite believe in what I experienced there, so I just
cooked up a bit larger pathology set: "bigmx2.zmailer.org" -- ok,
5.6 kB reply for dig ... Propably it works.
.. not MAXFORWARDERS array size was smaller than that monsterset :-/
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/Matti Aarnio <firstname.lastname@example.org>