I have a home heating system that sends me emails to report system status.
I have a separate Gmail account for this purpose. The hardware just needs my Gmail address and password to do this, so I just set and forget.
A year or so ago this stopped working, and I discovered that the problem was that Gmail started requiring 2 factor authorization, and there was no way to set this up as the hardware is not using a browser. I solved this by setting Gmail to "low security" and everything was fine again. I don't think that security is important for this application, as the system can only send emails, not receive them.
Now Gmail is removing the low security option, so I'm stuck again. Is there a workaround for this?
The system does let me use SMTP, but I don't really know much about that. And I suspect that Gmail would still require some advanced authorization for this.