So, tell me if the following statement is correct please.
- Nokia Messaging is a service by Nokia that keeps a connection open with a imap mail server (also gmx), and in case of new emails, sends a notification to my N900 that retrieves the emails using Modest (so, basically Nokia Messaging isn't a mail program on the N900, but more a service provided by some Nokia servers).
Wrong?

What I meant in my previous message isn't that gmx provides push email, but that it's possible to use it through Nokia Messaging, since it has free imap (if Nokia Messaging permits to configure not-famous mail providers).

In the mean time I informed myself about what "push email" means.