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My Exchange Server Is not allowing my ColdFusionMX server to "RELAY"

Posted on 2003-03-19
Medium Priority
Last Modified: 2013-12-16
First of all, I am a one man show, where I've tried to learn a little about everything--enough to be dangerous. Here is the basic network setup.  Please understand that it may seem very disorganized, but this is as best as I've been able to pull from the texts.  I


Connection Type:   DSL
Router:            Lyknsys
                   Static IP address on router (Static IP)
                   Router Internal Address      
                   Host: dns           Domain: heloc.net
                   Port  25 Requests    to
                   Port 110 Requests    to
                   Port  53 Requests    to
                   Port  80 Requests    to

                   (I have a good connection to the Net)

Internal Network:

SERVER1            NT4.0SP6  Backoffice Running the following services
ISLAND             Private IP The Public IP is on the Router's NIC.
                   IIS 4.0
                   DNS--I handle primary DNS and Granitecanyon.Com does my secondary
                                      Network Properties > DNS Tab > HostName:ISLAND   Domain: Island1
                                      > DNS Service Search: (Static IP)
                                                   by ISP)
                                                   (Assigned by ISP)
                                      > Protocol Tab > TCP/IP >

                                      > Advanced Tab > IP Addresses:
                   Exchange Server 5.5 (I'm able to receive and send email on my workstations)

SERVER2            NT4.1SP6  Backoffice Running the following Services
CASASNUEVAS        Private IP
                   IIS 4.0
                   ColdFusion MX
                   Network Properties > DNS Tab Same as SERVER 1 with the exeption of Int. IP

                   Private IP

I'd like to fine tune the setting on the Exchange server so that I can use the ColdFusion Server on SERVER2.  If you see any other setting that may be wrong, please let me know...

Question by:jcperez2000
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LVL 24

Expert Comment

by:David Wilhoit
ID: 8168244
I assume you have an internet mail connector? In that case you can use the IMC to allow .15 to relay mail for you, on the routing tab of the IMC properties. If you need an exact answer, tell me what the settings on the IMC are currently. Also, service pack level.


Author Comment

ID: 8168503
Thank You For Responding.

Is there a difference between an "Internet Mail Connector" and the "Internet Mail Service?"

ColdFusion Executes well, however, the messages are not getting relayed.  The Mail Log states 550 Relaying is Prohibite...

Here are my settings. Thanks again.

Exchange 5.5 SP4

IMS > Internet Mail Tab
      Attachement Outboud > MIME Checked
      Character Sets > MIME >Western European (ISO8859-1)
                   NO MIME > Western European (ISO8859-1)
      Specify By Emai Domain > heloc.net
      Enable Message Tracking > Checked
      Advanced Options: Have Not messed with so should be

IMS > Connections Tab
      Transfer Mode > Inbound & Outbound
                    > Advanced > Default
      Message Delivery > USE DNS
      Specify by Email Domain > HELOC.NET
      Accept Connections > From Any Host
                         Specify by host > NONE

IMS > Routing Tab
      Reroute Incoming SMPT > Checked
                            > Routing
      Routing Restrictions > Host & Clients with Ip Checked

                           > Hose & Clients with Internal..



LVL 24

Expert Comment

by:David Wilhoit
ID: 8169046
No, no difference between the 2

Now,on the routing tab, you don't need the FQDN of your mail server, take it out.

Do you have a host record for the coldfusion server on your primary DNS? If not, sset up a hosts file on the exchange server for .15, see what happens. And restart the IMC

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Author Comment

ID: 8169083
How do I set up a Host file on the server for .15?  My primary dns is dns.heloc.net.  Do you mean for me to add an "A" record under heloc.net looking at

Thansk Again..
LVL 24

Expert Comment

by:David Wilhoit
ID: 8170090
Well, you wouldn't want a primary DNS server to have a private IP address listed, so unless you want the world to know about .15 by way of an external address, the cleanest way would be to open the hosts file on exchange, and add a line for .15. I still don't know if this will resolve your issue, but it's wortha try. Truthfully, still trying to figure out why it isn't working, and DNS is all I can see.


Author Comment

ID: 8170665
This is what I did.  I took out dns.heloc.net from the primary and in fact I unchecked Reroute Incoming SMPT. I also deleted all the entries from >Reroute Incoming SMPT.  

The moment I did this VOILA...It worked.  However, I'm concerened that I may have opened a public relay. How could I check for this...

Thanks for your help..

Author Comment

ID: 8171363
Yes I was right. Now, I can use the SMPT service from the CF server, however, someone has already discovered my open relay....I went back and closed it for now.

Is there a way arround this. When I turn on my website, it will be heavily dependant in "send to friend" deals and mass email as well.

Right now all of my domains with the exception of the mail server are listed on the IMS > Rounting > Reroute Incoming SMTP mail.

For now I've checked off Rounting > Routing Restrictions > Host and Clients with this Ip addreses, and this has closed the Open Relay....

I tried adding the IP address of the CF machine as a host under "Host and Clients connecting to these internal addreses" and it doesn't work.

Any suggestions.......Thanks
LVL 24

Expert Comment

by:David Wilhoit
ID: 8171445
What service pack is Exchange on right now? This is weird, the steps you've taken should work.

Author Comment

ID: 8171466

Author Comment

ID: 8242738
WIll you be able to help out on this issue. The only way to allow for the hosts to use the SMTP is by CHECKING
Routing Restrictions > Host and Clients Connecting to these internal addresses (Which displays the internal addresses of my PCs)

Now the moment I check this box, I can send SMTP mail. However, the queue fills up with over 2000 outbount pending messages....and my Outlook client goes crazy, with "unable to deliver outbound message...."

Evidently someone is attempting to relay through my service...

Thanks againg for your continued assistance...

Charlie Perez

Author Comment

ID: 8326205
Good Morning,

I haven't yet heard from you.  Will you be able to assist me with this question?

Thank You,

LVL 24

Expert Comment

by:David Wilhoit
ID: 8326334

Sorry, your post got lost among the many messages I had. Refresh me...tell me what your EXACT IMC setup looks like now. What firewall, what ports are open, what email client are you using. This shouldn't be as difficult as it's been so far.

LVL 24

Expert Comment

by:David Wilhoit
ID: 8326341
" Port  53 Requests    to"

close that! unless you are running a public DNS server, this is unnecessary, and it's a big security hole.


Author Comment

ID: 8326417
I run a DNS server....on port 53.  I use a Lynksys BFSR41 Router.  Whatever, firewall protection is offerec by this box is all I have. I use Outlook 2000 as the email client.

Thank You.

PS. The basic problem is that I can't get Exchange to allow the internal addresses to relay.

Why do I need to do this.  I run a ColdFusion Serve which uses a CFMAIL tag. It looks for SMTP on the mail server.  I use this tag to send out mail from our TELL A FRIED links on the website and send out Mass emails as well..

LVL 24

Accepted Solution

David Wilhoit earned 1500 total points
ID: 8326591
So DNS is running on the server, publicly? I'd be willing to bet that the Exchange server and the ColdFusion server are a bit confused. Try pointing either server to another DNS server besides yours. Since all services are running on 1 box (DNS and Exchange) resolution might be a bit skewed.

"220 island.island1 ESMTP Server (Microsoft Exchange Internet Mail Service 5.5.26
55.55) ready"---There is a later version of this, I stronly suggest you go and get it from MS.

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