We have a SharePoint 2016 server, and we have setup outgoing emails using Gmail, and everything was working fine for the last few years, However, the emails suddenly stopped sending since June 2022. I can see the emails in the queue folder. I have tried creating App password for the gmail account and tried using that in the Delivery -> outbound security -> basic authentication settings under the SMTP properties in IIS6, still no luck.

  • Please provide the complete configuration you're using on IIS SMTP.
    – user6024
    Oct 14, 2022 at 4:55
  • I am using the exact steps as mentioned here: c-sharpcorner.com/article/… Oct 14, 2022 at 5:22
  • Have you created an App Password for your Gmail account? Gmail recently enforced 2FA for all accounts which prevents Basic auth from working. support.google.com/accounts/answer/185833
    – user6024
    Oct 15, 2022 at 10:07
  • I have tried App Aassword and used the app password in the basic auth Oct 20, 2022 at 5:00


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