Returns information about the current mailbox. Returns FALSE on failure.
The imap_check() function checks the current mailbox status on the server and returns the information in an object with following properties:
Date - last change of mailbox contents
Driver - protocol used to access this mailbox: POP3, IMAP, NNTP
Mailbox - the mailbox name
Nmsgs - number of messages in the mailbox
Recent - number of recent messages in the mailbox