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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / The SMTP error code 53...
Small and medium business | Business Central, N...
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The SMTP error code 535 indicates an authentication issue during email sending

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Posted on by VG-29070420-0 2
Hello All,
 
When I am trying to send mail I am facing this type of issue.

Error:- the SMTP server rejected the authentication request, as the authentication data is incorrect. verify that your username and password are correct and that the SMTP server supports the specified authentication type (basic). SMTP error code: 535.

Categories:
Dynamics 365 Business Central
Dynamics 365 Business Central
Dynamics 365 Business Central
I have the same question (0)
  • Suggested answer
    Gerardo Rentería García Profile Picture
    Gerardo Rentería Ga... 23,574 Most Valuable Professional on at
    The SMTP error code 535 indicates an authentication issue during email sending
  • Suggested answer
    Khushbu Rajvi. Profile Picture
    Khushbu Rajvi. 19,160 Super User 2025 Season 2 on at
    The SMTP error code 535 indicates an authentication issue during email sending
    Hi, are you using an App Password for your email account? That is needed if you have MFA required for your email account.
     
    Below link will help you to create app password.
     
    Regards,
    Khushbu Rajvi
  • Suggested answer
    CU18020837-0 Profile Picture
    CU18020837-0 on at
    The SMTP error code 535 indicates an authentication issue during email sending
    Does this error occur frequently over a short period of time?

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