diff -up man-pages-3.22/man5/nsswitch.conf.5.pom man-pages-3.22/man5/nsswitch.conf.5
--- man-pages-3.22/man5/nsswitch.conf.5.pom	2009-07-25 08:53:42.000000000 +0200
+++ man-pages-3.22/man5/nsswitch.conf.5	2009-09-16 09:45:54.000000000 +0200
@@ -50,9 +50,11 @@ file.
 The following databases are available in the NSS:
 .TP
 .B aliases
-Mail aliases, used by
+Mail aliases, provides a system-wide mechanism to redirect mail for local
+recipients. Used by mail transfer agents such as Postfix or
 .BR sendmail (8).
-Presently ignored.
+Note: On Linux, not like on other Unices, Sendmail uses its own aliases
+resolution system independent on `/etc/nsswitch.conf'.
 .TP
 .B ethers
 Ethernet numbers.