MS will be depricating basic auth on pop3 october 2020.

Does pop3 will continue to work after that?

Is it possible to use OAuth with a pop3 connection ? I can't find any documentation on that.

  • 1
    Out of curiosity, why are you using POP3 with Exchange Server?
    – joeqwerty
    Commented Oct 25, 2019 at 14:09
  • It's a command line program that is creating Tiket based on incoming mail.
    – Sebastien
    Commented Oct 25, 2019 at 14:14

1 Answer 1


This is all described in this technet article.

Basic Authentication is superseded by Modern Authentication (based on OAuth 2.0). Customers are encouraged to move to apps that support Modern Authentication prior to the Basic Authentication removal in October 2020. After October 2020 apps will not be able to use Basic Authentication when connecting to Exchange Online

This change only affects commercial M365 at this time, not our consumer service Outlook.com users. It impacts Exchange ActiveSync (EAS), IMAP, POP, and Remote PowerShell.

  • This article describe that MS is deprecating basic auth. My question is how to use OAuth with pop3 and the article doesn't talk about that...
    – Sebastien
    Commented Oct 25, 2019 at 14:16
  • This is not your question as it is written. Your question was: "Is it possible to use OAuth with a pop3 connection", answer: yes, with Modern Authentication based on OAuth 2.0.
    – Lenniey
    Commented Oct 25, 2019 at 14:18
  • I can't find any doc on how do you connect to pop3 using modern authentication. I know that I need to obtain the OAuth token but how do I connect to pop3 with this token... That's why it is not clear to me if pop3 is supported with modern authentication even though the above article say it is.
    – Sebastien
    Commented Oct 25, 2019 at 14:42
  • Have a look at this and this and that
    – Lenniey
    Commented Oct 25, 2019 at 14:47
  • This is probably the answer to my question : > To make it easier to migrate your existing applications to use OAuth 2.0, we are making significant investments to our service that include OAuth 2.0 support for POP, IMAP, and background application support for Remote PowerShell MFA module. We will be sharing more information on these new features over the coming months.
    – Sebastien
    Commented Oct 25, 2019 at 14:55

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