four questions for email client

[radium]

1. Can I create filters for blocking or storing the emails in another dir?
2. In the INBOX window i see 2 more columns (on the of the "From", "Subject", Date Received"). What this is for?
3. Is there any way to know what mails have an attachment by looking only the INBOX window?
4. Is there any way the folders tree to stay open so i can see all the subfolders without clicking all the crosses (+) every time i click on the EMAILS module tab.

sorry for my bad english and thank you very much!