6.4.5. query

create-alias               a   create an alias from a message sender
mail                       m   compose a new mail message
query                      Q   query external program for addresses
query-append               A   append new query results to current results
search                     /   search for a regular expression
search-next                n   search for next match
search-opposite    not bound   search for next match in opposite direction
search-reverse         ESC /   search backwards for a regular expression