rmail-previous-labeled-message
rmail-previous-labeled-message is an interactive autoloaded Lisp function in `rmailkwd.el
'.
(rmail-previous-labeled-message N LABELS)
Show previous message with one of the labels LABELS.
LABELS should be a comma-separated list of label names.
If LABELS is empty, the last set of labels specified is used.
With prefix argument N moves backward N messages with these labels.