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  • Exchange as standalone Email Server

    Hello All hope you are doing fine..

    I want to setup Exchange Server and standalone mail server like.

    1. I have a domain name.
    2. I have a Public Ip (static Ip address)
    3. MX records point out to mine Public IP.

    withe the help of above setup, I am able to receive the directly mail to mine exchange. But whenever i tried to send mail directly it bounced or sometime it reached. So Now i am using Smart Host to sending mail.

    So is there is any way to that we can send mails directly from our Exchange BOX

    Thanks

    aman dhally

  • #2
    Re: Exchange as standalone Email Server

    Without knowing the reason why the messages are bouncing, it is impossible to say.
    Any reason why you cannot continue to use the smart host? Many people are faced with that option and it works fine.

    Do ensure that you have a reverse DNS record, that it resolves correctly and matches the FQDN on the SMTP virtual 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: Exchange as standalone Email Server

      The reverse record will only help when sending to places like AOL and would not result in messages queuing. In that case the message is actually deliverd to the remote host but rejected and you would get an NDR.

      But what ever the issues is do this, open a cmd prompt and manually send a message from the exchange server to another SMTP host.

      Try maila.microsoft.com if you don't know any other hosts.

      http://technet.microsoft.com/en-us/l.../bb123686.aspx

      A good rule to follow is;
      If you can do it manually then Exchange should be able to do it.
      If you can not do it manually then Exchange won't be able to either.

      If the SMTP VS is still using a default config my bet would be a none exchange aware AV doing some kinda of port blocking.

      Now I have a question.
      Where exactly are you smarhosting to and why are they letting you relay though them ??? :P

      Comment


      • #4
        Re: Exchange as standalone Email Server

        Originally posted by TonyROZe View Post
        Where exactly are you smarhosting to and why are they letting you relay though them ??? :P
        If the OP is relaying through their ISPs server, then this isn't a question worth bothering with. Having to send email through an ISPs SMTP Server is something that a significant number of Exchange servers have to do.

        As for reverse DNS, that is practically mandatory if you want to deliver email directly, not just for AOL, but for others. If you cannot set a reverse DNS, then use your ISPs SMTP server as 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: Exchange as standalone Email Server


          Wow you really put me in my place, note to self, never ask anyone who they are using as a smarthost.

          As for the rest of your bad advice, even if it was an issue caused by the lack of a reverse record, messages would not queue on his server (the problem this user is having) as his messages would be sent to the remote host and rejected by the remote host and a NDR sent back to the user and not just sit in queue.

          And since you mentioned it, rejecting incoming SMTP messages based on reverse DNS is the weakest and lamest form of domain filtering. You do know that all this does is map a host name to IP and is so easily spoofed that no self respecting mail admin would use it in any form or have you never heard of NDR spam ?? If yer not using a SPF/Sender ID implementation w/ rcpt filtering you’re wasting cpu cycles but I digress.


          In any case, like I said just telnet from the server to another SMTP host and manually submit a message. If it is the PTR then the remote host will tell you after you try and submit the message as the remote host will drop the connection. Just remember, if you can do it manually, no reasson Exchange shouldn't be able to and vice versa.

          Comment


          • #6
            Re: Exchange as standalone Email Server

            While rejecting email based on reverse DNS may be a lame method of trying to filter spam, it is a method that an awful lots of major ISPs use, because believe it or not, it actually does work.
            By rejecting those with no reverse DNS or a reverse DNS that looks like a dynamic IP address range you can easily knock out 40 - 50 % of spam without any load on the server. That is why AOL specifically does it. They have been doing it for some time and must find that it works without too many complaints.

            However I don't know what NDR spam has to do with it.

            NDR spam has nothing to do with reverse DNS records. NDR spam is caused by clueless email admins who accept the email and then reject it afterwards to the sender.
            Reverse DNS record lookup is done at the point of delivery, before the message is rejected, so doesn't cause NDR spam.
            Recipient filtering puts a stop to a lot of NDR spam and is also something that should be done by default.

            SPF/Sender ID etc are close to a waste of time. Who implemented those first - spammers. The use of them is so low that they cannot be used for anything more than scoring, which means you are wasting cycles, when something like reverse DNS record lookup will allow a higher percentage of spam to be dropped with less resource use. The fact that some people get their messages blocked by those tactics is simply collateral damage. If you cannot setup your server correctly then your messages will be blocked.

            However in my first post I did ask for the text of the NDR, as without that all of the above points are simply guess work.

            The point is, a lack of reverse DNS record is the most common reason for messages not being delivered, and therefore is always the first thing to check.

            As for the comment on a smarthost, unless the OP is using an open relay, or has paid for a service, there is a good chance that it will be their ISPs host that is being used - again because that is the most common fix for delivery problems.

            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: Exchange as standalone Email Server

              Thanks all guys for discussing this issue, I am posting some old NDR , when i am trying to send mails to hotmail (without smart host)..


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

              Subject: Hello
              Sent: 11/15/2007 10:28 AM

              The following recipient(s) cannot be reached:

              [email protected] on 11/15/2007 10:28 AM
              There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
              <mail.bdaconnect.in #5.5.0 smtp;550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support>

              I also get these kinf of NDR when i was trying to send mail to YAHOO,GMAIL,AOL etc.

              Here is some questions :

              1. If we have exchange server , Static IP, then why we or (I) would need Smart Host.
              2. I am using smart host from another mail server ( one of mine friends email ID)
              3. I want to direct delivery of mine mails, i don't want to depends on any third party smart host.

              Thanks

              aman dhally

              Comment


              • #8
                Re: Exchange as standalone Email Server

                Originally posted by amandhally View Post
                <mail.bdaconnect.in #5.5.0 smtp;550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems.

                1. If we have exchange server , Static IP, then why we or (I) would need Smart Host.
                2. I am using smart host from another mail server ( one of mine friends email ID)
                3. I want to direct delivery of mine mails, i don't want to depends on any third party smart host.
                The recipient servers are likely seeing your emails coming from an alleged spam source.

                1. You don't, you can send out via DNS instead. Smart Hosts have their place depending on your setup but are not required.
                2. This is likely your problem. Why are you sending via your friends Smart Host? You can use mxtoolbox.com among others to determine if this server is on any blacklists.
                3. Setup your SMTP connector to use DNS rather than a smarthost.

                The second picture down is the relevant bit
                http://www.msexchange.org/tutorials/...Connector.html
                cheers
                Andy

                Please read this before you post:


                Quis custodiet ipsos custodes?

                Comment


                • #9
                  Re: Exchange as standalone Email Server

                  Did you get that NDR when you sent the email directly, or via this other smart host?

                  Rather than using one that belongs to a friend, you should use the one supplied by your ISP. That is unlikely to be unavailable unless your ISP fails, and then you will be unable to send any email.

                  It makes no difference in the email delivery whether you end directly or via another host, particularly if you use your ISPs SMTP Server. The email will take a few milliseconds to arrive - if that.

                  Having a static IP address doesn't mean you can send email directly.
                  Does your ISP allow you to setup a reverse DNS entry on that address? If not then you don't have a static IP address that will be accepted by other SMTP servers and you will have no choice but to use the ISPs SMTP Server.
                  You may have to call the ISP to find out of you can set the reverse DNS address or not.

                  I know I keep going on about reverse DNS, but it is the most common reason for message delivery failure and is the first thing that you need to look at.

                  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


                  • #10
                    Re: Exchange as standalone Email Server

                    Hello Sir,
                    I received this errors when i am sending e mail directly.
                    And i am unable to make a reverse DNS bcos my ISP not allowed it.
                    and because i have to purchase hosting (may be ) to use SMART HOST. bcos according to me, SMART HOST contain some remote email server address and his email ID for sending mail using his authentication.

                    Thanks

                    Comment


                    • #11
                      Re: Exchange as standalone Email Server

                      If you can't set a reverse DNS then you will be unable to send email directly in a reliable manner. It will have to go through a smart host. End of story.

                      As for a smart host - look to see what instructions your ISP provides for Outlook Express users and try the same server that is given in those instructions for SMTP (Outgoing) email. That may work. If it does not, then you will have to use a third party service - Google for mail hop services.

                      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


                      • #12
                        Re: Exchange as standalone Email Server

                        Thanks Sembee Sir,

                        Sorry for reply late ...

                        yes i not able to setup reverse DNS, but i m talking with my ISP to do that for me.

                        yes i have mine ISP mail id , i will try to setup. and i m looking for some relaible email forwarding service.

                        Thanks a lot Sir

                        regards

                        Aman Dhally

                        Comment

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