Re: SMTP Outbound thru specific NIC card (on server with 2 NICs)

- In other words, some users are connected to a different network with the
linksys connected to the cable-modem router as their default gateway? and
others with the linksys connected to DSL?
- Why not put all users on a switch and connect that to the DSL linksys?
That way they can all be on the same network and you don't have to dual-home
your Exchange server.

- Regardless of whether you do the above, make sure the SMTP virtual server
is only bound to the ip address of the NIC connected to the DSL linksys. Try
restarting smtp svc after the change.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"John Lucena" <JohnLucena@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:6C424DF6-5CD2-4AB7-88AF-DD2D8C48A5B8@xxxxxxxxxxxxxxxx
Hi Bharat,

1) Additional Config info: There is a linksys router between the server's
NIC1 and the DSL modem and another linksys router betweeen the cablemodem
and
the server's NIC2 card. So the linksys(es) provide firewall support and
only
have selected ports open.

2) Goals: We are a small company so we have some of our users computers
connected on the DSL router, and some users on the CableModem router. The
server is the only one that's on both so that everyone has access to
e-mail
filesharing regardless of which network they are on.

Is this not good configuration? Everything seems to be working fine other
then this e-mail issue. Seems like if I can just get exchange to send-out
only through the DSL (with that IP in the e-mail header) then my problem
is
solved.

If you have other suggestions I would be interested in hearing/learning. I
could reconfigure the network if that's advisable.

Thanks,
-John


"Bharat Suneja [MVP]" wrote:

- What do you want to accomplish with dual-homing the server?

- Is the Exchange server connected directly to both the DSL modem and the
Cable modem? (In other words, is it sitting on the Internet with both
those
public IPs?). If yes, I'd recommend not doing that.

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


"John Lucena" <JohnLucena@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:13342DB0-2194-46C1-8C52-733A66AAB970@xxxxxxxxxxxxxxxx
Hi Bharat,

Thanks for your reply.

Yes this is for outbound internet e-mail.

I am only running 1 SMTP virtual server. I did try binding it only to 1
specific address (instead of all available) but that didn't seem to
work.

Maybe I should explain in more detail:

We have 2 internet connections - 1 DSL with a fixed IP, 1 CableModem
with
dynamic IP. Unfortunately that dynamic IP seems to be blacklisted as
SPAM
on
a few of our customers e-mail providers so unfortunately when we try to
e-mail those customers (and the server decided to send it via the
CableModem
- the e-mail gets bounced back to us as refused by the customers e-mail
provider).

I thought the simplest way to correct this would be to just force
Outbound
SMTP connections to the internet to go through the DSL with fixed IP so
that
it won't be considered SPAM.

Does this make sense? Is there a way to do this with Exchange? When I
did
change the SMTP virtual server to only the DSL IP address - email was
still
getting sent out as being from the CableModem IP (and then refused as
spam).

Thanks in advance for any additional help you can provide.
-John



"Bharat Suneja [MVP]" wrote:

For outbound internet mail?

Do you want to route outbound mail through one NIC only?
Make sure SMTP virtual server is only bound to that particular NIC.

Do you have 2 SMTP virtual servers - 1 bound to each NIC?
Are you trying to use one as primary and the other for failover?
Create SMTP Connectors for address space * with the smtp virtual
server
as
bridgehead on each Connector, and assign appropriate cost.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"John Lucena" <John Lucena@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:6451DBF3-C643-4184-87EF-F2BE0A2CE810@xxxxxxxxxxxxxxxx
Hi,
I'm running Exchange 2003 on a server that has 2 NIC cards, each
connected
to a router out to the Internet on different IP addresses. I would
like
all
Outbound SMTP traffic to go through a specific NIC card so that it
goes
out
via that specific IP address. (Right now it seems to switch back and
forth
between the 2 NICs).
I have played around with the SMTP Virtual Server and SMTP Outbound
service
(configuring a Smart Host, etc.) but I can't seem to get it to work
consistantly.
Can anyone provide me with some assistance/ideas?
Thanks,
-John








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