pmg-mail-filter.adoc: describe match field filter

diff --git a/pmg-mail-filter.adoc b/pmg-mail-filter.adoc
index 6a4d8f81fb36e2264a52cd3011e0b647b29d329c..233891c92ea90dae9ee4cd968e9aac045fd2e696 100644 (file)
--- a/pmg-mail-filter.adoc
+++ b/pmg-mail-filter.adoc
@@ -206,6 +206,10 @@ Virus Filter::
 
 Matches on infected mails.
 
+Match Field::
+
+Match specified mail header fields (eg. `Subject:`, `From:`, ...)
+
 Content Type Filter::
 
 Can be used to match specific content types.