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-   -   Exchange MX Domains (https://www.askmehelpdesk.com/showthread.php?t=191265)

  • Mar 5, 2008, 04:38 AM
    Roberttanti
    Exchange MX Domains
    Hi Guys,

    I got a problem with Exchange. I have a primary email domain which is being associated with the exchange account, then I also have other domains forwarded to my exchange. But Exchange 2003 has a setting which requires addition and authorization of any new secondary MX domain before it can start accepting them. Anyone have any idea how I can do it?

    Any help you be appreciated,
    Thanks,

    Roberttanti :)
  • Mar 6, 2008, 06:37 AM
    chuckhole
    What are you using for an SMTP server? Are you using your own SMTP server in the DMZ and forwarding to your Exchange Server? Are you using an SMTP Connector? How many Address Spaces are you using or are you using a (*) wildcard and allowing all addresses to be relayed? What kind of structure do you use and how many Routing Groups? Is there a different Address Space for each Routing Group?

    The MX record only defines the IP address as a Mail Exchanger. This is what advertises your mail server to the Internet for your domain(s). You will need to add a domain definition to your SMTP server for each of the domains you will receive. Keep in mind that your mailbox can be defined with many email alias addresses so that you can receive more than one address but only one address can be set as your Primary address. This is the address which is defined as your Reply address.
  • Mar 7, 2008, 05:38 AM
    Roberttanti
    Thanks for your reply mate! All mail domain emails are forwarded from my ISP to my static IP address where the exchange server is. I have 6 domains whose emails I have forwarded to my exchange and filtered for different recipients on Active directory. I have another domain whose mail is forwarded to my static IP by my ISP but there is a setting in exchange where you can enable these authorized domains to be allowed by your exchange. Would you happen to have any idea please?

    Thanks again for your reply,

    Roberttanti
  • Mar 7, 2008, 06:44 AM
    chuckhole
    Are you using a Front End to Back End configuration? Are you using an external SMTP server in the DMZ or is your Exchange Server on the dirty side of your network?

    All this depends on how your SMTP Connectors will be configured. In general, you can define an Address Space for each domain and set delivery rules for each domain.

    In your Exchange System Manager, go to the Administrative Groups, your group name, then select Routing Groups, select your routing group name, then Connectors. This is where you will need at least one or more SMTP Connectors for your email domains.You can also create SMTP Connectors in other Routing Groups to define what Each will be defined with at least one Address Space. Each SMTP Connector also has delivery rules. This is where you can control message size, delivery restrictions, etc. If you are using this server as the delivery point, then you would use DNS to deliver the email otherwise you would forward your email to a Smart Host. This Smart Host may be your own SMTP server in the DMZ or an ISP, etc.

    If you are using your own SMTP Server, then you will have to configure it to relay email only for those domains so that you are not allowing Open Relay. If you do, you will quickly find yourself Blacklisted as a Spammer.

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