This figure shows how an address rewriting rule rewrites first.last of an e-mail address. The Pattern (LHS) uses the operators and wildcards $*.$* to match the first and last name in an e-mail address, while the Result (RHS) uses the operators $1.$2@uuhost to rewrite first.last to first.last@uuhost. The description of the rule is "Changing the first.last to first.last@uuhost".