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-rw-r--r--proto/pcre_table11
1 files changed, 8 insertions, 3 deletions
diff --git a/proto/pcre_table b/proto/pcre_table
index 0f58c2b..e4c6607 100644
--- a/proto/pcre_table
+++ b/proto/pcre_table
@@ -190,9 +190,14 @@
#
# Postfix parses the result as if it is a file in /etc/postfix.
#
-# Note: if a rule contains \fB$\fR, specify \fB$$\fR to keep
-# Postfix from trying to do \fI$name\fR expansion as it
-# evaluates a parameter value.
+# Note: if an inlined rule contains \fB$\fR, specify \fB$$\fR
+# to keep Postfix from trying to do \fI$name\fR expansion as
+# it evaluates a parameter value.
+#
+# Note: when using \fI$name\fR inside an inlined pattern, use
+# \eQ\fI$name\fR\eE to disable metacharacters such as '.' in
+# the \fI$name\fR expansion. Otherwise, the pattern may have
+# unexpected matches.
# EXAMPLE SMTPD ACCESS MAP
# # Protect your outgoing majordomo exploders
# /^(?!owner-)(.*)-outgoing@(.*)/ 550 Use ${1}@${2} instead