If you send e-mails from the store through Microsoft servers, it is already possible to authenticate the connection to the server with a Microsoft account. We have implemented a solution similar to the one we made available for Google accounts a few weeks ago. As of October 1, 2022, Microsoft, for the support of e-mail accounts, will begin to successively disable authentication of the connection via SMTP (i.e., by providing the login and password for the account).
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