Many users still prefer to interact with mailing lists via email. I'm one of them.
Some of the mailing lists I follow are maintained in Google Groups, which doesn't provide a good interface for subscription for people without a Google account.
Anyway, it's *still* possible to subscribe to these groups if you replace `group-name` with the name of the group you'd like to subscribe to and visit:
```https://groups.google.com/forum/#!forum/group-name/join```
In order to unsubscribe, visit the following link after replacing `group-name` with the name of the group:
```https://groups.google.com/forum/#!forum/group-name/unsubscribe```