With a level 2 or greater configuration file (see the
V configuration command in Section 17.5), V8 sendmail passes the
user part ($u) of local recipient addresses
through the localaddr rule set 5 as a hook to
select a new delivery agent. If the F=5 flag
(F=5) is set for the delivery agent, the
localaddr rule set 5 is called after all aliasing
(including the ~/.forward file). The
-d29.1 (a.k.a. -d29) debugging
switch causes the address to be printed as it appears before the
localaddr rule set 5 rewrite:
maplocaluser: output of printaddr( ) here (Section 16.3)
Information about the address is printed with the
printaddr( ) routine. The output of
maplocaluser( ) becomes the input to
recipient( ), so the result of rewriting can be
seen by using the -d26.1 debugging switch (-d26.1) in combination with this one.
