How to fix SMTP "Server Response: '550 5.7.1 Relaying denied" error?

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  • gspgsp
    New Member
    • Feb 2011
    • 1

    How to fix SMTP "Server Response: '550 5.7.1 Relaying denied" error?

    When sending mail we are getting this error:

    SMTP, Server Response: '550 5.7.1 <xxxxx@yahoo.co m>... Relaying denied. IP name possibly forged [xx.xx.xx.xxx]

    Before it worked fine. For hosting and testing the applcation, we will be accessing client's desktop through through VNC client. the IP comes in the error is the one which we used while connecting the server through VNC viewer. Few days back this IP has been changed and they gave us a new one.

    we are using php Mysql. Server is iis. We are accessing their local machine.

    Please suggest!

    Thanks
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