How can I Resolve SMTP Error 550 5.7.1 Unable to Relay in Exchange 2013

Home Forums How can I Resolve SMTP Error 550 5.7.1 Unable to Relay in Exchange 2013

This topic contains 6 replies, has 4 voices, and was last updated by  Eddie Thwan 1 week, 5 days ago.

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  • #6401 Score: 0

    Eddie Thwan
    Moderator
    44 pts

    Hello,
    I am getting an Error 550 5.7.1 Unable to Relay while using Microsoft Exchange 2013. Exchange throws this error message whenever I try to send or receive emails from the Server. I am unable to troubleshoot the issue after searching for the solution for hours. I don’t have any idea why I am getting this Exchange 2013 SMTP error 550 5.7.1 Unable to Relay. Can anyone please tell me why this issue occurs?

    #6403 Score: 0

    Barry Alllen
    Moderator
    25 pts

    Hi Eddie,
    In this error, the first digit of the code describes that if the Exchange Server accepts the command, encounters any activity or begin any suitable activity. If any syntax or connection error occurs, then they are displayed using these subsequent error codes. Like all the errors in MS Exchange, there are multiple factors which can be responsible for error 550 5.7.1 Unable to Relay in Exchange 2016, 2013, 2010:

    • Multiple restrictions are imposed on the Sender’s Domain in the Recipient’s policy by the receiver domain.
    • When the Outgoing mail doesn’t recognize the sender.
    • If the authentication fails for the sender domain.
    • Corrupted Exchange database could be another reason.
    #6404 Score: 0

    Eddie Thwan
    Moderator
    44 pts

    Hello Barry,
    Thanks for the reply. This means there are multiple factors which are responsible the error. Now, if I want to rectify the issue, can you please suggest me some method using which I can solve the issue as my email communication has come to a halt.
    Thanks & Regards
    Eddie

    #6405 Score: 1

    Henry Davidson
    Moderator
    32 pts

    Hi Eddie,
    If you are having problems with Microsoft Exchange Server and getting the error. Then, you can implement the following steps:

    1. Run Exchange Server Manager.
    2. Then, go to Administrative Group Name.
    3. Here, select Administrative Group Name >> Server >> Server Name.
    4. Click on Protocols and choose SMTP.
    5. After that, right-click on Default SMTP Virtual Server to choose Properties.
    6. Go to Access tab and select Relay option. Then, select Only the List Below.
    7. Here, select the IP and Domain which you want to relay.
    8. Enable the checkbox “Allow all the systems to successfully authenticate to relay regardless of the list above” option.
    9. Now, close all the opened tabs and check if the SMTP server allows you to send emails.

    The above-mentioned steps will allow you to fix Exchange 2016, 2013, 2010 error 550 5.7.1 Unable to Relay in almost all the cases but fails to work if the database is damaged or corrupted.

    #6406 Score: 0

    Eddie Thwan
    Moderator
    44 pts

    Hi Henry,
    Thanks for the solution. I implemented all the steps that you explained but I am still facing the issue. I think my Exchange database file is damaged and it needs to be repaired. Is there any method using which I can remove corruption from the DB file as I am not able to access my mailbox data and also can’t send and receive emails. My work is getting hampered. Can anyone please provide any solution for it?
    Thanks & Regards
    Eddie

    #6407 Score: 1

    Kerry Morris
    Moderator
    33 pts

    Hello Eddie,
    As you told that your Exchange database is damaged and you are getting the SMTP error 550 5.7.1 Unable to Relay in Exchange 2013. Then, you can use a professional solution i.e. a third party application to export EDB mailbox to PST format. Using this software, you will be able to repair even the highly damaged Exchange DB files with ease.

    This solution will help you to solve your issue whether you are using Exchange 2016, 2103, 2010 or other lower versions of it.

    #6408 Score: 0

    Eddie Thwan
    Moderator
    44 pts

    Thank your for providing the solution Kerry Morris. I used the application which you mentioned and after using it, I successfully managed to transfer my mailbox data to Outlook data file format. Then, I accessed that data in it and continued my email communication.

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