Sending Mail Out to Internet from Exchange 2000

[FlemC]

Hi,

I've been trying to resolve this one for a few days. I want to have a home based Exchange 2000 server send mail out to the Internet (for testing). But, I keep going around in circles. These are my current configurations:

HARDWARE/ROAD RUNNER
Currently, I have the server (and two PC's) connected to a Linksys router (which I use to connect to ROAD RUNNER via DSL. An Outlook 2000 client PC can send/receive mail to/from my road runner account using smtp-server.nyc.rr.com and pop3-server.nyc.rr.com without any problems. The Linksys router sees ROAD RUNNER's WAN IP address as 24.90.137.51, WAN gateway as 24.90.136.1, and DNS's as 24.29.99.80, 24.29.99.81 (subnet 255.255.248.x).

My internal LAN is using the 10.x.x.x range. Simply, my LinkSys router is 10.x.x.1, Exchange 2000 Server is 10.x.x.10, Client/PC's are 10.x.x.70, 10.x.x.50, 10.x.x.60

DNS
I have a registered domain name with register.com with DNS servers at NS1.MYDYNDNS.ORG and NS2.MYDYNDNS.ORG (which I'm not sure if I need or don't). Let's say the name of my doamin is TEST.COM (FQDN: Win2K.test.com). I want to host my own website on this server (for testing purposes). So, instead of renting an ISP I have an ALIAS domain name from DYNDNS.com called test.dnsalias.com that uses 24.90.137.51 as an IP address on the Internet. I have nothing really configured on my DNS for this to work. I can set my Default WEB SITE with a index.html in a virtual directory and when I type test.dnsalias.com I can see the site on my internal server from the internet (as long as I have the server on : )) No problem!

Okay..now for mail server....

EXCHANGE SERVER
I created two mail users (MAILUSER1@TEST.COM) and MAILUSER2@TEST.COM)to use via Outlook on two PC's (10.x.x.60 and 10.x.x.70). These PC's can send and receive mail to one another internally. Now, I want them to send out mail. So, I set up a SMTP CONNECTOR called InternetSMTP (ADDRESS SPACE tab - SMTP * COST 1 with Entire Organization checked, GENERAL tab - Use DNS to route.... with Bridgehead server being internal FQDN: Win2K.test.com). Then, Properties of the DEFAULT SMTP Virtual server are: ACCESS tab - RELAY restrictions to 10.x.x.60 and 10.x.x.70 with the ALLOW ALL COMPUTERS WHICH SUCCESSFULLY AUTHENTICATE... checked on, Delivery tab - Fully Qualified domain name (win2k.test.com) and in the Configure External DNS I used the IP addresses of the NS1.MYDYNDNS.ORG, NS1.MYDYNDNS.ORG and ROADRUNNER DNS's. When I try to send out I get the following:

Your message did not reach some or all of the intended recipients.

Subject: test
Sent: 4/1/2003 3:31 PM

The following recipient(s) could not be reached:

'myname@nyc.rr.com' on 4/1/2003 3:32 PM
The destination system is currently not accepting any messages. Please retry at a later time. If that fails, contact your system administrator.
<win2kas.test.com #5.3.0 smtp;553 5.3.0 Mail from 24.90.137.51 rejected,see

http://mail-abuse.org/rbl/enduser.html>

I READ THE LINK ABOVE and it said that the DUL (maybe Road Runner) is blocking that IP Address. But, I want to make sure of my configurations before I call ROAD RUNNER. Also, I tried changing the EXTERNAL DNS numbers in the Default SMTP virtual server configuration, and not using specific computers for RELAY ACCESS. Also, I tried adding those same DNS IP addressed I mentioned to the FORWARDER tab under the DNS configuration of my test.com - without any luck.

No matter what I try I can't send out mail - forget trying to receive...which I haven't even tried yet.

I need a hand with this one. I tried alot of gyrations without any success. Thanks very much.

FlemC

 

[doomhamur]

First, i beleive roadrunner blocks all smtp traffic exept for their servers in order to keep ppl from doing what you are. You need a comercial account with them in order to have your own mail server. having a static ip helps but i think you said you where using a dynamic dns service.

Second, if you have a registered domain just with register.com they provide dns pointing service for you, make sure the MX record for your domain is pointing to the correct IP address or service. (i prefer using a static ip so i can just point the mx record directly to my router.)

Third, There is the possibility to use roadrunners smtp servers like this: With exchange2k, you dont need an smtp connector, it is already running when you install your system (under exchange system manager look in Servers > Protocols > SMTP > default SMTP virtual server). Remove the connector.

Fourth, setup DNS properly. Your internal DNS server (should be on your DC) needs to have forewarders set to the DNS IP addresses of roadrunner. All other machines point to the ip addresses of your DC. Your DC NIC dns points to its own ip address (not the loop-back of 127.0.0.1) and not to the roadrunner ip's.

I hope this helps, feel free to contact me on yahoo messenger if you need more help.



Doomhamur
Network Engineer
&quot;Certifications? we dont need no stinking certifiaction.&quot;
yahoo IM handle: greater_vortex

 

[FlemC]

doomhamur,

Thanks for your response. Just a couple of questions.

1. Are you saying I definitely have to have an ISP...which means renting for a fee each month? I am trying to avoid this. I have a test website on my server (when it's running) and it can be seen on the internet (like hosting my own website). I just want to be able to send out mail from or through my Exchange 2000 server to the internet.

2. Do I add a MX record to my DNS internal server (which is on the same server as Exchange and website) pointing to NS1.MYDYNDNS.ORG and NS1.MYSYNDNS.ORG. Is this what you mean? I don't think these are mail servers.

3. If I delete the SMTP Connector. I can add it again, and Active Directory will not get messed up right?

4. Currently, my interanl DNS is on a DC. I do have forwarders to the roadrunner DNS IP's. Should I use DHCP and allow the clients to find the DNS automatically. Is that what your saying? ANd, my DNS NIC does point to its own IP. DO I need to delete the 127.0.0.1 (localhost) in DNS?

Also, do I have to do all of this. Or just one of the four items you mentioned?

Thanks again..I think after this I'll have a much clearer picture.

Have a nice day\weekend!
FlemC