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-rw-r--r--doc/mailfromd.texi18
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/mailfromd.texi b/doc/mailfromd.texi
index 51be5e3a..b9629c68 100644
--- a/doc/mailfromd.texi
+++ b/doc/mailfromd.texi
@@ -747,6 +747,24 @@ them as of functions in programming languages. Currently the following
747expressions are implemented: 747expressions are implemented:
748 748
749@table @code 749@table @code
750@item dbmap @var{file} @var{atom}
751 @var{file} should be a literal string, @var{atom} an arbitrary
752atom which evaluates to a valid string. This conditional returns
753@code{true} if the key @var{atom} is present in the @acronym{DBM} file
754@var{file}. If @var{atom} contains a @samp{@@} character, only the
755part before this character will be used, thus allowing to check emails
756against the aliases database:
757
758@smallexample
759@group
760if not dbmap "/etc/mail/aliases" $f
761 @dots{}
762fi
763@end group
764@end smallexample
765
766Notice that @var{file} must not end in @samp{.db} suffix.
767
750@item hostname @var{atom} 768@item hostname @var{atom}
751@cindex @code{hostname} 769@cindex @code{hostname}
752 @var{atom} should be a string representing an IP address in 770 @var{atom} should be a string representing an IP address in

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