+ def mark_as_deleted ids
+ ids = [ids].flatten # accept single arguments
+ unsynchronized_scan_mailbox
+ imap_ids = ids.map { |i| @imap_state[i] && @imap_state[i][:id] }.compact
+ return if imap_ids.empty?
+ @imap.store imap_ids, "+FLAGS", [:Deleted]
+ end
+ synchronized :mark_as_deleted
+
+ def expunge
+ @imap.expunge
+ unsynchronized_scan_mailbox true
+ true
+ end
+ synchronized :expunge
+