[Dovecot] Procmail sending to 'Folder ^'

Due to a fault in a procmail recipe, a number of files have been sent to 'Folder ^'. Would this mean anything at all to Dovecot? At this point I don't know whether the messages are physically on my drive or have been sent to /dev/null. I know there was one important message among them, so if they are recoverable I'd like to check them.

Anne