Help with correct DNS entry

Discussion in 'Windows Small Business Server' started by Steve F, Apr 18, 2005.

  1. Steve F

    Steve F Guest

    I have had some problems with certain domains accepting email and need some
    help with the correct DNS entry for the SBS 2003 Premium (2 NIC) box using a
    static IP and SMTP.

    If my SBS server name is MYSERVER
    and my domain is MYDOMAIN.COM

    shouldn't reverse DNL lookup report MYSERVER.MYDOMAIN.COM? Aol seems to
    indicate that just MYDOMAIN.COM should work :
    "If the sender’s domain is the only domain sending mail from a specific
    IP address, we recommend that the reverse DNS entry (PTR Record)
    match the domain name (A Record), but we do not require it".

    My ISP insists it has to be MAIL.MYSERVER.MYDOMAIN.COM but I suspect that is
    just the level one tech not realizing that the "MAIL" should be my mailserver
    (or in my case SBS 2003 Server) name.

    Thanks in advance for any help.
    Steve F, Apr 18, 2005
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  2. Steve F

    Matt Gibson Guest

    Whatever FQDN you type in to get to your SBS server is what it should be.

    Matt Gibson - GSEC
    Matt Gibson, Apr 18, 2005
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  3. As you found out, AOL will basically accept any PTR record, as long as
    there is one present. By default after running the connection wizard
    in SBS, your helo/ehlo argument on outbound messages is set to just
    your fully qualified domain name (i.e, It is quite a
    good idea to see if you can get the helo/ehlo parameter sent in
    outbound messages (especially if using end-to-end delivery) to match
    with the PTR record on the public interface. in Exchange it is quite
    easy to do this; if you leave this at the default after SBS wizards do
    their thing it is set to your external fqdn. You can change it by
    altering the options in the default virtual SMTP server, and I have
    done this to include (my RDNS at the moment).

    So basically I would do what I have done, but if the ISP want and
    force you to change this to something else it can be done easily as

    Andrew Hodgson, Apr 18, 2005
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