Hello Everybody,I havegot a dsl modem and it gets a public ip through dhcp from my isp and I forwarded that mail address to the private IP. I havegot a domain registered with the Godaddy with the name abc.com. I created a MX recordon the Godaddy which resolves perfectly when i digg dns using nslookup. I am able to receive all the emails but I am not able to send the emails from my exchange 2007 server. ( I know the problem is from the DNS but Idont really know where I am missing).My questions isIFMX record is hosted some where no on theISP you are taking internet from then which DNS server shall be used to route the mails. ??IP address of the the server 192.168.1.51Subnet mask255.255.255.0Default Gateway(ADSL Router)192..168.1.254DNS is my local dns 192.168.1.1Thanks if any questions please do let me know

If I'm understanding your question correctly the dns server used in outgoing mail dns resolution will be whatever your server's dns is set to. In this case it would be 192.168.1.1. When a message is sent to an external domain an mx lookup will be performed to find out what server to route the mail to. This article on creating a send connector might be helpful http://technet.microsoft.com/en-us/library/aa998814.aspx.Michael

In addition to setting up an Internet Send Connector, make sure if you do not have a Business DSL Circiut, opposed to Residental, your ISP is not blocking or limiting SMTP connections. I assume you have a Business DSL Circuit but I wanted to verify. I would also suggest investing in a good Firewall such as Cisco ASA 5505 if you are going to be running a business on this circuit. A good Firewall will allow for enhanced security features that will protect your network.MVP Exchange Server

Oliver Thanks for the Input and your suggestion but as a matter of fact I dont have the Business DSL its just a lab env and as a matter of face I am able to recieve email.Micheal Thanks to you aswell yes my dns server is 192.168.1.1 the dns forwarders are configured perfectly. Again My question is Suppose I have my mx record hosted on GODADDY instead of my local ISP can I route my mails using my local ISP'S DNS server. If you are talking abt the restrictions from the ISP there are no such restrictions. Thanks

Yes you should be able to send over from local isp's DNS server. While creating send connector please select below option Internal Internal Send connectors are used to send e-mail to servers in your Exchange organization. This connector will be configured to route e-mail to your internal Exchange servers as smart hosts. http://technet.microsoft.com/en-us/library/aa998814.aspx Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

As VINOD said your ISP's DNS server will be used to lookup records for external domains and because your connection is residential you'll definately want to configure a smart host using the email address, password, and settings supplied by your ISP. Michael

Hi,Since you can receive External mails on to your Local Exchange 2007 server, there is no question that your ISP is blocking port 25.Now the Question is you can't send mails, there could be 2 issues:1. Exchange 2007 Send connector is not configured. If not follow the procedure as mentioned in the below article to create a send connector for external domains http://www.petri.co.il/configuring-exchange-2007-send-external-email.htm 2. Local DNS server is not configured properly Make sure your local DNS server is able to resolve external MX records, if not in the DNS administrative console on the server properties provide the public DNS server IP of your ISP so that it can resolve the Public domain names. On the Exchange 2007 do SMTP diagnostics with the tool mentioned in the below article to find out the reason. (Tool Name SMTPDIAG.exe) Download the tool from the below link: http://www.microsoft.com/downloads/details.aspx?familyid=bc1881c7-925d-4a29-bd42-71e8563c80a9&displaylang=en Procedure to run this tool http://www.msexchange.org/tutorials/SMTPDIAGdiagnose-Exchange-2003-SMTP-DNS.html Note: place the smtpdiag.exe in the root of c:/ and open command prompt to execute the below command let SMTPDIAG "sender address" "recipient address" /v Ex: smtpdiag.exe a@domain1.com b@gmail.com /v Post the output if any errors in this output.....

Hi Sabresquad, Now the problem is you can't send email to external. It doesn't have any relation to where you host your domain's MX record. Please make sure you have set the send connector correctly according to the suggestions by the friends above. If the issue persists, please paste the NDR here for our discussion. Thanks, Elvis