Announcement

Collapse
No announcement yet.

DSL domain and MX records

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • DSL domain and MX records

    I have asked my ISP this, but being a weekend it will probably get answered Monday now.

    I am going to have an IP block at home and run exchange for training (ISP said there will be nothing preventing me from doing this) and was curious; your dsl account resolves to a name.

    For example; _IPAddress_nameofdslaccount.dsl.whatever

    Will this have any impact on the MX record pointing at the exchange server which will reside on one of the IP's?

    Thanks

  • #2
    Re: DSL domain and MX records

    That means you don't have a valid reverse DNS.
    Will not affect inbound email, but a lot of outbound email will fail.
    Ask the ISP if they will set a reverse DNS record, but if you aren't on a business package they will probably tell you to naff off.
    In that case you will need to use an SMTP Connector (E2003) or Send Connector (E2007) to send email via their SMTP Server.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

    Comment


    • #3
      Re: DSL domain and MX records

      Hi Simon,

      Thanks for your reply.
      I am in the process of moving ISP and have asked the question although haven't had the block so was assuming the IPadreess_domain.dsl.whatever scenerio.

      I will bring that up as I want to learn exchange as it was meant to be and not have to use their smtp server.

      Edit:

      That brought an interesting find. The IP the exchange server at my work premises is using (when using dnsstuff reverse dns checker) has IPAddress_btblahblah.blah

      I did for the same for a mail server that was set up by someone who knows betterr (!) and the result was; IP = mail.x.x
      Last edited by simonsays; 16th June 2007, 21:49. Reason: further information

      Comment


      • #4
        Re: DSL domain and MX records

        Setting up Exchange to route emails through an ISPs SMTP Server is perfectly valid. I have to do that for a significant majority of my clients as some large ISPs (AOL, Hotmail etc) have issues with most IP addresses assigned to DSL lines - whether or not they are a static address.
        At home I have a business connection, static addresses, reverse DNS etc, everything setup correctly yet still have to route about a quarter of email through a smart host.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment


        • #5
          Re: DSL domain and MX records

          Hi Simon,

          Thanks for clearing that up. Interesting to hear that certain providers reject mail sent from certain IP's. Is there a database that has some level of trust in operation?

          Simon

          Comment


          • #6
            Re: DSL domain and MX records

            If you look at some of the blacklists then you will find DULs - Dial Up Lists.
            However ISPs like AOL, Hotmail and other major email providers will often use their own blacklists which are not query-able by non-staff members.

            Simon.
            --
            Simon Butler
            Exchange MVP

            Blog: http://blog.sembee.co.uk/
            More Exchange Content: http://exchange.sembee.info/
            Exchange Resources List: http://exbpa.com/
            In the UK? Hire me: http://www.sembee.co.uk/

            Sembee is a registered trademark, used here with permission.

            Comment


            • #7
              Re: DSL domain and MX records

              Simon,

              All is clear. Thanks once again!

              Comment

              Working...
              X