Using OAuth2 (Microsoft) with PostBox on mac M1

[Gérald Tenenbaum]

if one selects OAuth2 (Microsoft) for an account @outlook.com with the server smtp-mail.outlook.com as recommended by Microsoft, then PostBox silently replaces OAuth2 (Microsoft) by OAuth2 (Google) and consequently sending fails.

How can one get out of this trap?

[Gérald Tenenbaum]

I eventually found the way out: delete the smtp and recreate it. Postbox sets smtp.office365.com by default but it works (although Microsoft recommends smtp-mail.outlook.com).

More than 30 messages with Postbox support, to eventually find the solution by myself. The team shows quite a lot of rigidity and lacks goodwill.