Re: ISA and SMTP
- From: John Burridge <JBurridge@xxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 13 Nov 2001 15:18:14 -0000
Lets recap my situation.
Basically I had an internal SMTP server, using DNS to deliver mail. I was
having difficulty when this server was trying to deliver mail addressed to
my internal exchange 5.5 server.
This was arising as the only forward lookup zone on my internal DNS was the
active driectory domain name. i.e any DNS request that it could not fulfil
was passed to the DNS server defined on the external NIC of my ISA. This
meant that when I looked up my email domain, it returned the IP address of
my external NIC.
TO avoid this problem I had to create a Forward lookup zone in DNS for my
email address, and create an MX record pointing to the internal address of
my exchange server.
J.
-----Original Message-----
From: Joe DeNave [mailto:joe@xxxxxxxxxxxxxxx]
Sent: 13 November 2001 14:46
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org
So what did your final configuration look like?
-----Original Message-----
From: John Burridge [ mailto:JBurridge@xxxxxxxxx
<mailto:JBurridge@xxxxxxxxx> ]
Sent: Tuesday, November 13, 2001 8:39 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
And it actually worked - I had a smart host that I didnt need.
-----Original Message-----
From: John Burridge [ mailto:JBurridge@xxxxxxxxx
<mailto:JBurridge@xxxxxxxxx> ]
Sent: 13 November 2001 13:29
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
I am using Exchange 5.5. If I already have a Internet connector, can I make
another SMTP connection?
On the assumption I cant, I have created a zone for my e-mail address, and
in that have placed an MX record pointing to my exchange server. When I go
to the other server with the SMTP service on it, and do an nslookup (set
type=mx), I get the correct internal address, yet still the mail does not
leave the queue. Am I missing anything?
Cheers,
J.
-----Original Message-----
From: Jim Harrison [ mailto:jim@xxxxxxxxxxxx <mailto:jim@xxxxxxxxxxxx> ]
Sent: 12 November 2001 14:37
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
The point is, you should use your IP management (DHCP, DNS, etc.) to help
that. Make an SMTP connector between them. It's all in the Exchange
docs... ISA isn't going to allow that kind of traffic (14120-error), because
it makes no sense to send packets to the external interface if they never
should have left the internal network to begin with.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
----- Original Message -----
From: "John Burridge" <JBurridge@xxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Monday, November 12, 2001 06:28
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
Well - I want this server to be able to send internal and external, but I
dont want to make a relay on my exchange server.
Thoughts
J.
-----Original Message-----
From: Jim Harrison [ mailto:jim@xxxxxxxxxxxx <mailto:jim@xxxxxxxxxxxx> ]
Sent: 12 November 2001 14:27
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
Yes, there is a workaround: stop doing that.
If the server is internal, let it make an internal request.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
----- Original Message -----
From: "John Burridge" <JBurridge@xxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Monday, November 12, 2001 04:22
Subject: [isalist] ISA and SMTP
http://www.ISAserver.org <http://www.ISAserver.org>
Hi,
I am publishing my exchange server through ISA. This has worked fine for
SMTP mail.
The problem I am having, is that I have another internal SMTP server. This
server delivers mail properly to all external adresses but not the ones on
my exchange server. When I telnet to any external SMTP server from this
server it works fine, but when I telnet to my exchange server using the IP
of the external NIC on my ISA server it does not work.
Does anyone have a work around?
Cheers,
J.
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