Using sendmail with gmail oauth2 credentials

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Petorr
Petorr on 8 Jun 2022
Commented: Petorr on 8 Jun 2022
I want to send emails programmatically from matlab through gmail, using sendmail. Gmail recently ended support for simple user&password SMTP and they now require oauth2. I almost have oauth2 working, but I think I am stuck on setting up sendmail to properly use "XOAUTH2" credentials. Sendmail returns an error, "Authentication failed."
My question is: assuming I have a valid access token with permissions "scope" set to https://mail.google.com, how do I configure the settings to use sendmail with XOAUTH2?
Any help appreciated, thanks!
  2 Comments
Petorr
Petorr on 8 Jun 2022
sendmail error:
Authentication failed.
% more detailed:
% 'Java exception occurred:
% javax.mail.AuthenticationFailedException
% at javax.mail.Service.connect(Service.java:306)
% at javax.mail.Service.connect(Service.java:156)
% at javax.mail.Service.connect(Service.java:105)
% at javax.mail.Transport.send0(Transport.java:168)
% at javax.mail.Transport.send(Transport.java:98)
% '

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Accepted Answer

Jan
Jan on 8 Jun 2022
  1 Comment
Petorr
Petorr on 8 Jun 2022
Yes, I saw that answer and it seems to work so far. I just don't know how long google will support this almost-the-same workaround, if the password expires occasionally or not, etc etc so I was hoping to get the whole oauth2 thing working. The method in the above answer does let me send emails as before, with gmail credentials and sendmail. Thanks Jan!

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