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Exchange 2000 relaying - 7.Mar.2002 10:06:00 PM

Guest

I want my server to relay only if the client authenticates. Trouble is, when I set SMTP for basic authentication, this also prevents other servers from sending mail bound for my domain.

Any tips?

Post #: 1

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RE: Exchange 2000 relaying - 8.Mar.2002 5:53:00 AM

Guest

Well, after searching for weeks, finding loads of undeliverable mail in my BadMail folder thanks to some spammer by the name of LIVEWEBCAM<various stuff>@yahoo.com, and being blackholed by orbz.org, I have finally found the answer!

I found it at: http://www.exchangeadmin.com/Forums/Thread.cfm?CFID=19223861&CFTOKEN=74289282&CFApp=72&Thread_ID=82909

See: <snip>

Date: January 15, 2002 12:53 PM
Author: David O'Malley (domalley@wyr.net)
Subject: Closing your Open-relay on Exchange 2000

To close your open relay on Exchange 2000, do the following.

In System Manger�. Expand Servers, Expand , Expand Protocols, Expand SMTP then right-click �Default SMTP Virtual Server� and select Properties.

On the Access Tab

1) Click Authentication, Ensure that all three options are checked. (Do NOT disable Anonymous as you will not be able to receive inbound mail) � Apply, OK

2) Click Connection, Click the �All except the list below� radio button and leave the list blank. � Apply, OK

3) Click Relay, click the �Only the list below� radio button and leave the list blank. Check "Allow all computers which successfully authenticate to relay, regardless of the list above" � Apply, OK

Next in System Manager

Expand Connectors, If you have the often found �Outbound� connector delete it. You can leave any custom built connectors, but you don�t need any.

Next in System Manager

1) Click Recipients 2) In the right window pane, right-click �Default Policy� then properties 3) On the E-Mail Addresses (Policy) Tab. Make sure that all domains you are handling mail for are listed with an SMTP Entry, if not.. add those needed. � Apply, OK

Next open Services (Start, Settings, Control Panel, Administrative Tools, Services)

1) Stop �Microsoft Exchange Routing Engine� 2) Stop �Simple Mail Transport Protocol� 3) Start �Microsoft Exchange Routing Engine� 4) Start �Simple Mail Transport Protocol�

Following these steps will close your open relay and allow you to receive all inbound mail.

When you have external clients they will have to set their mail programs to authenticate when sending mail.

I hope this helps

Sincerely,

David O'Malley Network Manager

<unsnip>

Whew! It worked for me! Thanks David!

(in reply to Guest)

Post #: 2

RE: Exchange 2000 relaying - 26.Mar.2002 3:53:00 PM

asdsrl

Posts: 13
Joined: 6.Sep.2001
From: Marcon
Status: offline

after I setup my server like you tell, I cannot send email because my server doesn't understand my login/password.
Why?

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Post #: 3

RE: Exchange 2000 relaying - 3.Apr.2002 2:41:00 AM

Digitalcandy

Posts: 197
Joined: 2.Jul.2001
From: Orange County, CA
Status: offline

quote:
Originally posted by asdsrl:
after I setup my server like you tell, I cannot send email because my server doesn't understand my login/password.
Why?

Let's pretend your domain is poop.com. You have an external user trying to use POP3 to deliver and access mail. The username is Bsmelly and his email address is bob_smelly@poop.com.

With Outlook and Outlook express the username must be Poop\bob_smelly\bsmelly

(in reply to Guest)

Post #: 4

RE: Exchange 2000 relaying - 10.Apr.2002 4:55:00 PM

dtisone

Posts: 5
Joined: 1.Apr.2002
From: Orange, CA
Status: offline

I am having the same problem trying to use IMAP from an external client

After allowing my ISA Server SMTP filter to allow these SMTP commands:
AUTH LOGIN
AUTH NTLM

I am now presented with a username / password box that does not seem to like any combination of my username. I tried USERNAME, DOMAIN\USERNAME, and DOMAIN\E-MAILNAME\USERNAME as stated in the previous post, but nothing works.

When I check the ISA server I note SmtpEvt errors #20031 in the Application Log with a bunch of junk in the message area (which I assume is my encrypted username / password combo.

My only other workaround now it to turn on all relaying on the server (not what I want to do)

Any ideas? [Confused]

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Post #: 5

RE: Exchange 2000 relaying - 6.Jun.2002 6:59:00 AM

Bobo

Posts: 3
Joined: 6.Jun.2002
From: Miami
Status: offline

Vince.... YOU ARE THE BEST!

I've been battleing with this dilema for such a long time and haven't been able to resolve it. I also had several clients (externally) that have accounts on my server and had the problem of spammers going wild. Now it all makes sense. I was wondering why my domain email would go thru but not the other domains. That policy edit was the trick. I can't thank you enough. Spammers were killing my server by the badmail files and chewing up every drop of memory to send their spam.

(in reply to Guest)

Post #: 6