As a ugrad, and later a PhD student teaching, everything is explained the first day. If you can figure it out you just fail the class (or go to office hrs to get help, etc).

As an associate professor, I do explain things the first day, but I am certainly not permitted to fail students as a consequence of not checking their email daily.

Even if they didn’t hand in an assignment at all, without any reason provided, I’m required by regulation to offer them a second chance to pass that assignment.

The students’ rights are quite strong here (Northern Europe), which I generally support, but it has some downsides.

Interesting. I remember very strict rules on turning in programming assignments (as a student, and later TA). On time, printed properly, in a specific envelope, labeled as specified in the right location.