Getting error server status code 451 when attempting smtp inbound

Posted on 2014-08-16
1 Endorsement
Last Modified: 2014-09-02
Im getting this error now on the inbound smtp: Attempting to send a test email message to using MX
  Delivery of the test email message failed.
 Additional Details
The server returned status code 451 - Error in processing. The server response was: 4.7.0 Temporary server error. Please try again later. PRX2
Exception details:
Message: Error in processing. The server response was: 4.7.0 Temporary server error. Please try again later. PRX2
Type: System.Net.Mail.SmtpException
Stack trace:
 at System.Net.Mail.DataStopCommand.CheckResponse(SmtpStatusCode statusCode, String serverResponse)
 at System.Net.Mail.DataStopCommand.Send(SmtpConnection conn)
 at System.Net.Mail.SmtpClient.Send(MailMessage message)
 at Microsoft.Exchange.Tools.ExRca.Tests.SmtpMessageTest.PerformTestReally()

Elapsed Time: 605 ms.  
I was using the queviewer and noticed a lot of spam so I suspended the messages in there then rebooted. Upon restart the above error was generated. I checked the network adapter for and is set for the server. I tried a reboot again and still the same error. Please help!
Question by:JRome225
    LVL 1

    Author Comment

    Now in the quiwviewer only "submission" is listed. Should there be more items there besides spam domains?
    LVL 18

    Accepted Solution

    SMTP Error 451
    451 Requested action aborted: local error in processing
    451 You have exceeded your messaging limits
    The program cannot send more messages, because your mail account / mail server has a limitation.
    Please contact your mail administrator or mail provider regarding this issue.

    Please note, that the program cannot send out more messages as your mail server allows. Some mail server have limits, e.g. some allow to send only x messages per hour. You can use the List Settings -> Outgoing Mail Server (SMTP) -> Limit feature to adjust the program to any limit.

    If you have setup a limit in the List Settings -> Outgoing Mail Server (SMTP) then the task (mailing) will stop, the task will be re-scheduled and will continue automatically after the specified delay

    if you suspected the spam mail, then we need to look for spam mail source and blocked it. Since you view it using queue viewer, double click on one of spam mail to get more details of the mail

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