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The server response was: 5.5.1 Authentication Required
over 9 years ago
"Error - The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required."
While I was integrating Email functionality using Gmail SMTP Server in a Asp.Net Application, I got an Exception."The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required."
The solution which I got that: We have to login into our Gmail Account and switch on the "Access to Low Secure Apps".
Goto the following Link:
Access Less Secure Apps This will give you the following screen:
Set the Access for Less secure Apps to True.
This solved my problem...Hope it helps...!
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over 7 years ago
i did less access than still error there same -
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