object imap_status(int imap_stream, string mailbox, int options);This function returns an object containing status information. Valid flags are:
SA_MESSAGES - set status->messages to the number of messages in the mailbox
SA_RECENT - set status->recent to the number of recent messages in the mailbox
SA_UNSEEN - set status->unseen to the number of unseen (new) messages in the mailbox
SA_UIDNEXT - set status->uidnext to the next uid to be used in the mailbox
SA_UIDVALIDITY - set status->uidvalidity to a constant that changes when uids for the mailbox may no longer be valid
SA_ALL - set all of the above
status->flags is also set, which contains a bitmask which can be checked against any of the above constants.