Since a couple days/weeks, users cannot receive emails to reset their firebase auth pw. I first thought it's because the user's email provider blocks the firebase sender domain. So I generated a pw reset link with the firebase admin sdk and manually send it to the user - did not arrive. Even when I send it from my private email, id did NOT arrive. It's not just one user, it seems to happen for a large portion of users, but not sure what they all have in common. Maybe all M365 users? Not sure. I can only confirm that on my M365 business email, an email does not arrive to my inbox as soon as it contains a firebase pw reset link, no matter the sender.
Anyone else experiencing that problem?
