RE: SBS2003 - Exchange config

From: Matthew Greig (mgreig_at_groundlevelconsulting.com)
Date: 07/15/04 

Date: Wed, 14 Jul 2004 18:41:19 -0700

So then my question is:

Why not just use the "Use DNS to route e-mail" option and
forget about forwarding all of your email to your ISP?
What's the value add to forwarding email to your ISP? I
see the benefit of using a POP3 connector to receive
email, as it's an extra line of defense in case there's
an outage with your Exchange server in which case the
inbound email will simply sit on the ISP's mail server
until your Exchange server is back up and running....
However, I don't see the benefit the other direction.

TIA

Matthew
>-----Original Message-----
>Boris,
>
>An SMTP smart host is simply an SMTP server, usually
maintained by an ISP, which can forward your outbound
mail, once it receives it. An
>SMTP smart host does a lot of other things, but the only
one we're interested in is its ability to relay outbound
mail for your domain. The
>ISP's e-mail servers are commonly referred to as SMTP
smart hosts and are usually running the UNIX based
SendMail application.
>
>You must arrange to have an SMTP smart host relay your
outbound mail BEFORE sending mail to it, otherwise the
operator of the SMTP
>smart host will think you're a spammer and block
receiving any mail from your server.
>
>Contact your ISP and arrange for them to relay your
outbound mail through one or more of the SMTP smart
hosts. While you're on the
>phone with them, obtain the IP address(es) of the SMTP
smart host(s) which will be relaying your outbound mail.
You will use the IP
>address(es) to configure the SmallBusines SMTP connector
using either the Configure Email and Internet Connection
Wizard (CEICW) or
>manually in the Exchange System Manager.
>
>When you run the CEICW on the SBS 2003 server, you
receive the option to configure Exchange to either "Use
DNS to route e-mail" or
>"Forward all e-mail to e-mail servers at your ISP."
Select the latter choice, then enter the IP Address(es)
of the ISP's e-mail server(s)
>which the ISP provided to you for relaying in the window
provided. Surround each IP address in square brackets.
Separate multiple
>entries using semi-colons. For example, enter "[w.x.y.z];
[r.s.t.u] if you enter the IP addresses for two e-mail
servers. The CEICW takes
>the information provided on this property *** and
configures the Exchange 2003 SmallBusiness SMTP Connector
correctly.
>
>Using the CEICW is the recommended way to configure your
Exchange 2003 server to forward mail to an SMTP smart
host.
>
>If you want to configure the Exchange server's
configuration manually and not use the CEICW method
above, you can do the following:
>
>Open the ESM, go to connectors, right click on the
SmallBusiness SMTP connector, select properties. On the
General Tab, you will have the
>options to either "Use DNS to route to each address
space on this connector" or "Deliver all mail through
this connector to the following
>smart hosts". If the latter choice is selected, you
will be able to enter the name or IP address of the smart
hosts, separated by a
>semicolon. If you use the smarthost's IP address, enter
it thusly: [W.X.Y.Z] where W, X, Y and Z are the 4 octets
of the IP address. The
>square brackets surrounding the IP prevents the server
from having to perform an NSLookup for the smart host
each time a connection is
>made to it, which will speed up the server's
performance. Apply the change to the SmallBusiness SMTP
Connector, click OK.
>
>Once you have configured the SmallBusiness SMTP
Connector to deliver mail to the ISP's SMTP smart host,
restart the Default SMTP Virtual
>Server in the ESM and test outbound mail flow from a
client, through your Exchange 2003 Server to an external
recipient relayed by the
>ISP's SMTP smart host.
>
>
>Best Regards,
>
>Ricky Morris, MCSE
>
>Microsoft Small Business Server Support
>
>This posting is provided "AS IS" with no warranties, and
confers no rights.
>
>Newsgroups:
>SBS v4.x : microsoft.public.backoffice.smallbiz
>SBS 2000: microsoft.public.backoffice.smallbiz2000
>SBS 2003: microsoft.public.windows.server.sbs
>
>
>--------------------
>From: "Boris Kagan" <bkagan98 at yahoo dot com>
>Subject: SBS2003 - Exchange config
>Date: Wed, 14 Jul 2004 09:40:40 -0400
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>Hello,
>
>I have a problem with configuring an Exchange server to
send emails through
>an external ISP. I used POP3 connector for receiving
emails and it is
>working fine.
>
>Any suggestions? Thanks.
>
>
>
>
>
>.
>