Re: more than two MX record

B.

Thanks
so in other words the following scenario wont work

on my ISP site
MX record mail.domain.com->xxx.xxx.xxx.xx1
MX record mailbox.domain.com ->xxx.xxx.xxx.xx2
on my site
router #1 xxx.xxx.xxx.xx1->spam firewall-> exchange server
router #2 xxx.xxx.xxx.xx2->exchange server

client side
outgoing server mailbox.domain.com
incoming server mailbox.domain.com

every other client
outgoing preferred ISP
incoming preferred ISP
pointing of course to mail.domain.com

please advise

"Bharat Suneja [MVP]" wrote:

Don't think most MTAs have any support for using specific MX records, so as
posted earlier I don't think that particular approach will work.

All you need to do is allow your router to forward SMTP traffic inbound on
the second/new IP to the Exchange server directly, then have the postmaster
in the sending organization hard-code that in their system - you can do it
by IP address or insert an A record mapping to that IP address in your
external DNS. If the sending domain is using Exchange, all they need to do
is set up an SMTP Connector for your domain, and specify the second IP
address/fqdn as a smarthost.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"naguaramipana" <naguaramipana@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:8961B913-1830-47CC-A3E6-617539EFA85F@xxxxxxxxxxxxxxxx
B.

Thanks for the prompt reply.

here is were I am.- I have two static public ip from my isp, then I have
two routers one for each ip address, my isp holds my external dns and Mx
record.

1) my now in service MX record mail.domain.com points to router number one
and from here my router sends all email for my domain to a spam firewall
and
from here all goes to my exchange server
2) I want certain user outside my network to use a second MX record
mailbox.domain.com and get that mx record pointing to my second IP address
which goes to the second router and from here directly to my same exchange
server.

is this possible, what do you think

Thanks


"Bharat Suneja [MVP]" wrote:

Yes, you can add an additional A record mapping another fqdn to the
second
IP, and point a new MX to it.

What are you trying to accomplish with this?

- If you add this with the same priority/preference number as the
existing
one, these will load-balance (DNS round-robin). h
- If you add the second one with a higher number, mail will only be
routed
to it if the first one fails.

If the outside user wants to send to the second/new IP address, it will
need
to be hard-coded in the sender's environment - if they use Exchange, they
will need to setup a SMTP Connector for your address space and specify
the
second/new IP as a smarthost.

In that case, you do not need to add a new MX record (which will allow
outside email to bypass your spam firewall at some point.. ).

Perhaps a better way to do this:
- Create an additional SMTP virtual server for that org, mapping the
second
external IP address to it on your firewall
- Create smtp/ip filters to accept connections only from that Org's ip
address(es)
- Optionally, set up SMTP authentication on the VS

--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"naguaramipana" <naguaramipana@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message
news:4894FB49-941B-418B-8D37-FDC05FED8E77@xxxxxxxxxxxxxxxx
Hi gurus

I have and exchange 2000 server, two statics ip, two routers.- each
router
has it own Ip address.- my mx record points to one of my public IP and
all
email comes through this using one of my router, then my router push
all
email to my spam firewall and my firewall push those emails to my
exchange
server.

I want some of my outside user to send email using the other router and
bypass my spam firewall.
do I just create another MX record pointing to the next static ip and
use
my
router to forward those email directly to my exchange server

my MX record mail.domain.com can I create the second MX record like
mailbox.domain.com and route this to exchange directly. let my user
know
what
the incoming and outgoing server mx record is?


Thanks guys







.

Relevant Pages

  • Re: Advice needed - running Exchange
    ... the router to your nic ... You'll need to have your ISP create two additional DNS records for your ... delivery is set to the Exchange mailbox, ... I currently only have one NIC in my SBS server ...
    (microsoft.public.windows.server.sbs)
  • Re: more than two MX record
    ... the second ip address and therefore to my router number two ... domain that can directly send messages to your Exchange server. ... outside email to bypass your spam firewall at some point.. ...
    (microsoft.public.exchange.admin)
  • Re: Advice needed - running Exchange
    ... Exchange mailbox. ... You'll need to have your ISP create two additional DNS records for your ... Run the Connect to Email and the Internet Wizard on SBS ... I currently only have one NIC in my SBS server ...
    (microsoft.public.windows.server.sbs)
  • Re: more than two MX record
    ... both MX records have same preference number ... If they're using Exchange, they can simply ... the second ip address and therefore to my router number two ... domain that can directly send messages to your Exchange server. ...
    (microsoft.public.exchange.admin)
  • Re: Advice needed - running Exchange
    ... Outlook experts for confirmation on this if you like...I've seen it happen, ... You will want to keep both the exchange and isp accounts in there for ... with the Exchange mailbox. ... server, or can I just use the one. ...
    (microsoft.public.windows.server.sbs)
Loading