While using python-smtp to send mail, I getting the error on smtplib.SMTPAuthenticationError:(535,b'5.7.139 Authentication unsuccessful, the request did not meet the criteria)

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While using python-smtp to send mail, I getting the error on smtplib.SMTPAuthenticationError:(535,b'5.7.139 Authentication unsuccessful, the request did not meet the criteria)

Anonymous

I want to know is any way to get key-access(trusted key) pass the authentication in smtp-outlook .

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Answer 1

Dear SARAN_S,

Thank you for choosing Microsoft Community.

Based on your mentioned description, yes, I have gone through your mentioned scenario, seems like you are using some specific things or script to send email from SMTP address, I would like to draw your attention here, we have limited knowledge information for certain parameters and attributes, because we are mainly focusing Microsoft 365 exchange online related scenario on this forum community.

But, Microsoft has specific channel for certain different support scope and attributes, would you mind to contacting and pacing your concern on our dedicated Microsoft Q&A forum support channel? Our relevant support team can further provide you possible information from their side. Because,

Here is specific dedicated support channel to place your scenario: Microsoft Q&A

I would really appreciate your kind cooperation.

Have a nice day!

Sincerely,

Katherine

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While using python-smtp to send mail, I getting the error on smtplib.SMTPAuthenticationError:(535,b'5.7.139 Authentication unsuccessful, the request did not meet the criteria)

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