RE: Exchange 2000 Relaying

  • From: Graham Walsh <graham.walsh@xxxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 11 Jul 2002 22:24:14 +0100

Just remembered that when my ISP was telnet'ing to port 25, he was seeing
that he was 127.0.0.1 and not the external address.

-----Original Message-----
From: Wakelin, Frank [mailto:fwakelin@xxxxxxxxxxxxx]
Sent: 11 July 2002 22:18
To: [ExchangeList]
Subject: [exchangelist] RE: Exchange 2000 Relaying


http://www.MSExchange.org/

Just a thought...

Perhaps it was adding the local IP subnet that is still allowing the
relaying.  I'm assuming of course that your server is behind a firewall or
proxy of sorts.  Depending on the configuration of the firewall/proxy, the
SMTP server may only be seeing the internal IP address of your firewall and
therefore it would allow the relaying.  You could turn on logging of the
SMTP protocol, or sit at the console and do some "NETSTAT"s to see what
connections are being made (if you know you have a lot of inbound internet
email) to determine this.  That would tell you for sure the source IP the
server is seeing.

I think the best idea was to leave the defaults.  If you do need
unauthenticated relaying (say for network management-type email alerts) then
you should specify on the IP address of that server.  Certainly don't
specify the firewall as an IP to allow relaying though...
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-----Original Message-----
From: Graham Walsh [mailto:graham.walsh@xxxxxxxxxxxxx]
Sent: Thursday, July 11, 2002 1:36 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Exchange 2000 Relaying


http://www.MSExchange.org/

Hi Mark

Don't know, I just made sure that it was all set correctly and added in the
local IP addressing.

-----Original Message-----
From: Mark Fugatt [mailto:mark@xxxxxxxxx]
Sent: 11 July 2002 20:40
To: [ExchangeList]
Subject: [exchangelist] RE: Exchange 2000 Relaying


http://www.MSExchange.org/

Graham

What have you done to the relay option, by default Exchange 2000 does
not relay for unauthenticated users.

Mark L Fugatt
Pentech Office Solutions Inc
Rochester, NY
www.4mcts.com
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Fax: 716 249 0316
Cell: 585 576 4750
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For answer to your Microsoft Exchange questions visit www.msexchange.org
"In God we trust. Everybody else we verify using PGP!"


-----Original Message-----
From: Graham Walsh [mailto:graham.walsh@xxxxxxxxxxxxx] 
Sent: Thursday, July 11, 2002 3:29 PM
To: [ExchangeList]
Subject: [exchangelist] Exchange 2000 Relaying


http://www.MSExchange.org/

All

I am in need of some urgent help please.

I have a windows 2000 server with exchange 2000 (both SP2).  I have
enabled the SMTP Virtual Server so that it does not relay.  However, my
ISP is telling me that it is still open.  I have published the server
through ISA 2000 SP1.  Is ISA causing the problem by opening it up???

Once I have the relaying issue sorted, I need to install Norton for
Gateways.  Has anyone else had any problems with installing this.  I
have stopped all the exchange and SMTP services to make port 25
available when I install.  However, after the install, I am unable to
telnet to port 25.

Your help would be much appreciated.

Kind Regards

Graham Walsh
graham.walsh@xxxxxxxxxxxxx

DDI: 020 7642 4021
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