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Thread: Exchange not receiving external mail

  1. #1
    Join Date
    Jul 2008
    Posts
    15

    Exchange not receiving external mail

    I am having trouble with our Exchange server at the moment and cannot work out what is wrong. Basically I can receive internal mail on the domain between exchange users but nothing from an external address comes through at all.

    I have even tried from my own external account but it doesn't come through on the exchange server. The e-mail doesn't get returned as undelivered and there is no error when doing a manual SMTP to the exchange using an external SMTP server.

    Does anyone know what could be wrong?

    SBS2003 SP2

  2. #2
    Join Date
    Sep 2004
    Posts
    131

    Re: Exchange not receiving external mail

    You said while using external account e-mail doesn't get returned as undelivered, should I assume it as it worked for you? Also is your MS Exchange configured to accept mail for that domain? Until you reply, just try running few test from mxtoolbox.com and see if your server is all ok.

    Or just follow the steps provided in this KB describing “XFOR: Telnet to Port 25 to Test SMTP Communication” http://support.microsoft.com/kb/153119. let me know the results.

  3. #3
    Join Date
    Jul 2008
    Posts
    15

    Re: Exchange not receiving external mail

    Other people can receive external e-mails no problem. Even this individual user can receive e-mails on a different e-mail address but for some reason this one e-mail address is not receiving them.
    I cannot give out the e-mail address as it is one of my clients.

  4. #4
    Join Date
    Feb 2006
    Posts
    185

    Re: Exchange not receiving external mail

    Hello Kaotix, just try out these steps and see what happens:
    • Start Exchange System Manager.
    • Expand Servers, right-click Your_ Server_Name, and then click Properties.
    • Click the Diagnostics Logging tab, and then click MSExchangeTransport under Services.
    • Under Categories, click the category that you want to log.
    • Under Logging Level, click the appropriate logging level for the issue that you are investigating:
      1. None
      2. Minimum
      3. Medium
      4. Maximum
    • Repeat steps 4 and 5 for each category that you want to log.

  5. #5
    Join Date
    Jul 2011
    Posts
    4

    Re: Exchange not receiving external mail

    Hello, I am having a similar problem as a server that was configured and working 3 days ago is not getting any external email. It was working fine Friday night and now if try to send from Exchange server, the messages just sit in the queue and are not able to be delivered. I have not changed anything and as far as I know, nothing else has changed anywhere. Is there somewhere in Exchange 2007 that I can control the connections like I did in Exchange 2003? I cannot find what the issue is and have run out of places to look.

    Please help.

    Thank you in advance,

    JETalley

  6. #6
    Join Date
    Jul 2011
    Posts
    4

    Re: Exchange not receiving external mail

    Also, if this helps, When I run a telnet test, everything is Ok until to try to email my self from the problem server and I get, Unable to relay. Where is that being controlled at?

    Again,

    Thanks in advance.

    JETalley

  7. #7
    Join Date
    Jul 2011
    Posts
    4

    Re: Exchange not receiving external mail

    Here is the Telnet test I did.

    220 mail.domain.com Microsoft ESMTP MAIL Service ready at Mon, 11 Jul 2011 13:
    25:10 -0400
    ehlo
    250-mail.domain.com Hello [x.x.x.x External IP]
    250-SIZE 10485760
    250-PIPELINING
    250-DSN
    250-ENHANCEDSTATUSCODES
    250-STARTTLS
    250-AUTH
    250-8BITMIME
    250-BINARYMIME
    250 CHUNKING
    mail from:administrator@domain.com
    250 2.1.0 Sender OK
    rcpt to:email@externaldomain.com
    550 5.7.1 Unable to relay

    JETalley

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