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Using Oauth to send emails through office 365 SMTP

  • 31 January 2023
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With the deprecation of basic auth for office 365 SMTP is it possible to authenticate through other means in order to send e-mails?

I am currently trying to use the SMTP connector to send e-mails but keep getting -2 status codes for this action 

Error LOG:
Process action "send_email" in processflow "flow_anne_mail_test" in application 83 threw an exception. (571360e4)
System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, basic authentication is disabled

Should i be using another connector? Or switch to another SMTP service like sendgrid?

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Best answer by Kasper Reijnders 31 January 2023, 16:26

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Since 2023.1 you can use modern authentication. That is the preferred method by Microsoft. See: