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Enterprise Software Thread, Exchange External mail not flowing in Technical; Sorry I may not be much help but is the issue only related to incoming mail i.e. is external mail ...
  1. #16
    RobD's Avatar
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    Sorry I may not be much help but is the issue only related to incoming mail i.e. is external mail working without issue?

    Looking at https://www.wormly.com/test_smtp_server the MX record looks ok as mail.obbc.com.au connects and trys to send a mail.

    Also have you run the exchange mail flow troubleshooter?

  2. #17

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    I just ran the same test and got a fail. its very temperamental:

    Resolving hostname...
    Connecting...
    SMTP -> FROM SERVER:
    220 remote.obbc.com.au Microsoft ESMTP MAIL Service ready at Wed, 11 Sep 2013 06:41:01 +1000
    SMTP -> FROM SERVER:
    250-remote.obbc.com.au Hello [184.72.226.23]
    250-SIZE 52428800
    250-PIPELINING
    250-DSN
    250-ENHANCEDSTATUSCODES
    250-AUTH
    250-8BITMIME
    250 XXXXXXXX
    MAIL FROM: xxxxxxx@hotmail.com
    SMTP -> FROM SERVER:
    250 2.1.0 Sender OK
    RCPT TO: administrator@obbc.com.au
    SMTP -> FROM SERVER:
    250 2.1.5 Recipient OK
    Sending Mail Message Body...
    SMTP -> FROM SERVER:
    SMTP -> ERROR: DATA command not accepted from server:
    Message sending failed.


    Yes outbaound mail is working fine, its just inbound mail.

    have ran all the mail flow toolbox tools, and theres no issues being thrown up.

  3. #18

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    having said that, ran the mail flow ttroubleshooter and it came up with the following:

    Error submitting mail:
    Mail submission failed: Error message: Server does not support secure connections..

    im wondering if the TLS authenication for the server being enabled is causing an issue?? is it something that i can just disable or will i dig a deeper hole for myself?

  4. #19
    RobD's Avatar
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    TLS authentication where?? You need to check your receive connectors, try turning up the logging on your default connector to Verbose and have a look through the logs:

    Receive connector protocol log files for the Transport service on Mailbox servers %ExchangeInstallPath%TransportRoles\Logs\Hub\Proto colLog\SmtpReceive
    Receive connector protocol log files for the Mailbox Transport service on Mailbox servers %ExchangeInstallPath%TransportRoles\Logs\Mailbox\P rotocolLog\SmtpReceive
    Receive connector protocol log files for the Front End Transport service on Client Access servers %ExchangeInstallPath%TransportRoles\Logs\FrontEnd\ ProtocolLog\SmtpReceive

    Also how do you do spam protection?? Do you use a edge server as maybe that's blocking mail?

  5. #20

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    Always the same domain you're sending to?

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    When i mentioned TLS authentication i was looking at the receive connector properties, Authentication tab. i have set the receive connector to verbose for logging. it is a SBS single exchange server environment, no edge server, running windows sbs 2008. mail scanning is completely disabled right now while there are problems, and the client is getting very grump about the delay of this....so as always any suggestions are appreciated.

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    Sukh, it is inbound mail thats affected only....

  8. #23

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    Recreated the internet receive connector, all mail seems to be flowing as per normal now. thanks for your suggestions and help everyone.

  9. #24

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    Strange that creating the connector solved the issue, those are normally fine, either they work or not, sounds like yours was intermittent (Haven't read all your post). Post back if all goes wrongs again.

  10. #25
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    Glad you sorted it.



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