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  • Not able to send mail to outside domain.

    Hi,

    I installed Microsoft Exchange 2003 successfully. Telnet to mail server is working fine but I am not able to send and recieve any mails outside domain. Can you please le tme know what is wrong?

    Sometimes I get:

    The following recipient(s) cannot be reached:
    [email protected] on 10/8/2008 11:48 PM
    There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
    <mail.abcserver.com #5.5.0 smtp;550-5.7.1 [96.x.xx.xxx] The IP you're using to send mail is not authorized>

    or I get

    The following recipient(s) cannot be reached:
    arnold@gmail.com on 10/9/2008 2:55 AM
    The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry. If that fails, contact your administrator.
    <mail.abcserver.com #5.4.0>

    I am not really sure what is happening here?

    Awaiting your response!
    Thanks!

  • #2
    Re: Not able to send mail to outside domain.

    Check your server on mxtoolbox.com
    Can your exchange resolve the gmail mx records correctly etc?
    Can you telnet to their servers and send test mails?
    cheers
    Andy

    Please read this before you post:


    Quis custodiet ipsos custodes?

    Comment


    • #3
      Re: Not able to send mail to outside domain.

      I am not able to access mxtoolbox.com page?
      How do I check if exchange resolve the gmail mx records correctly
      I can telnet to Exchange server 2003 on the domain but how I send a mai?
      Internal mail works just fine.

      Comment


      • #4
        Re: Not able to send mail to outside domain.

        The first reason for rejection may have a number of reasons

        1. SPF Sender ID records for your domain do not list you mailserver ID
        2. You are on part of a dynamic IP range with your ISP (as policy a lot of mailservers ban these because most mail sent from them is spam)
        3. You do not have a PTR record with your machine's FQN in as per the RFCs for mailservers (as policy a lot of mailservers ban these because most mail sent from them is spam)
        4. Your IP address has been listed by one or more RTBLs (check spamhause etc.)

        To trouble shoot this further try sending mail via telnet from your server to a number of different adresses (While chatting with these servers you may find out why you are being rejected - the joy of clear text protocols)

        The second reject reason for rejection is self evident - You have DNS issues or the domain does not exist!

        Can the machine resolve DNS OK try some pings!

        Comment


        • #5
          Re: Not able to send mail to outside domain.

          If you can't access that site then you need to look into your DNS setup and network. Do you maintain that side of things?
          cheers
          Andy

          Please read this before you post:


          Quis custodiet ipsos custodes?

          Comment

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