Re: Outgoing mail via multiple smart hosts?


Probably better/easier just to use multiple SMTP Connectors.

I'll give it a shot.

But I'm still confused about the function of the FQDN box in the Default
SMTP VS Advanced Delivery properties. I've tried setting this to
server.domain.local (the SBS box) and to mypublicdomain.com (the public
email domain from which we collect email via a POP connector), and in both
cases, outgoing messages are bounced with the message "server [whatever]
requires authentication". But I thought I was sending the outgoing mail via
the Connector, or the Smart Host in the VS (result is the same in either
case).

So how is the name specified in the FQDN box actually used, and how can it
disrupt delivery which is supposed to be done via an ISP smart host?

Thanks
Nik


How to Configure Exchange Server 2003 to Use a Smart Host IP Address
http://support.microsoft.com/kb/821911

--
Merv Porter [SBS-MVP]
============================

"Kevin Weilbacher" <kw@xxxxxxxxxxxxxxxxxxx> wrote in message
news:EC0E06FC-9F33-41B9-A640-6CB92E7B2594@xxxxxxxxxxxxxxxx
Merv is correct --- to enter an IP address for an SMTP server, surround
the ip address with square brackets --
[11.22.33.44]

I do not know of a way to make a list of smart hosts for Exchange to use.

--
Kevin Weilbacher [SBS MVP]
"The days pass by so quickly now, the nights are seldom long"
*

"nik" <nik@xxxxxxxxxx> wrote in message
news:%23fwtX5KzHHA.4800@xxxxxxxxxxxxxxxxxxxxxxx
Hi Group:

We run SBS2003 (2003 Server SP2) with Exchange 2003 SP1. The SBS
machine sits behind a NAT with no direct connection to a public IP, and
all outgoing external email is routed via a smart host at our ISP.

We sometimes switch ISPs temporarily, from a DSL to a 3G route, when
there are DSL connectivity problems at our location. So I need to know
how to reconfigure Exchange to use multiple outgoing mail services.
(Incoming mail is fine, as all incoming is routed via a POP box and the
POP connector.)

Looking into the Exchange configuration for outgoing mail has confused
me mightily, and I would be grateful for answers to any or all of the
questions below...

1: I currently have our ISP's Smart Host name entered into Exchange in
two fields of the Default SMTP Server setup - under
"Messages > Forward all mail with unresolved recipients to host:" AND
"Delivery > Advanced > Smart Host.
Is this correct for a setup like mine? I've read that I should really
use smart hosts via an SMTP connector, not a VS, but I'm really not
clear on the difference between a SMTP VS and a Connector...? If I want
to use two ISPs, should I set up two virtual servers, two connectors, or
something else?

2: I am confused about what to enter in the Fully Qualitfied Domain Name
box - this server's FQDN is "server.domain.local", but if I put that in
the box, outgoing mail is returned with a "Server server.domain.local
requires authentication." error. I'm not sure how to interpret this,
since I'm not sure what the FQDN box does in the first place..?

3: If I need to switch ISPs, I need to enter a different Smart Host -
but our auxiliary ISP only provides SMTP server addresses as numeric
IPs. When I enter a numeric IP in the Smart Host box (in the Default
Virtual Server config), the setting is rejected because "the domain is
not valid". Why can't I enter a numeric IP as an outgoing SMTP server?

4: Isn't there a really simple way of giving Exchange a list of SMTP
servers (smart hosts) to try, in order of preference?

Thanks for any wisdom!
nik





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