how to connect to and upload to the sieve server?

I would very much like to use sieve for my mail filtering. I am a bit new to this and i'm trying to take this one step at a time. Has anyone on this forum successfully uploaded a sieve filter to this platform and witnessed it functioning?

According to the knowledge base it should be possible. that article is a little confusing in that it discusses implementations of sieve generally, but doesn't define the specifics of mailbox.org's implementation.

To that end I have a few questions I would like to start off with.

1. What is the sieve Server Name for mailbox.org?
2. Are the credentials I use to login the same as my account credentials?
3. What filter filename does mailbox.org require? The knowledge base article discusses the importance of using the correct filename, but doesn't supply that knowledge.
4. What sieve clients are compatible with mailbox.org?
5. What are some resources I can use to figure out sieve generally. I have been reading RFC 5804 and RFC 5228 as well as sieve.info, but I don't really trust that last one, many of the link are broken and the site seems unmanaged.

Thank you for taking the time to read my post.