Add note about test/update mode

diff --git a/README b/README
index bfd9d3c..69c4ad0 100644 (file)
--- a/README
+++ b/README
@@ -12,7 +12,7 @@ Features:
 - Log file with all actions
 - Caching
 
-Important note: Only the -first- received line is interpreted.
+Note: Only the -first- received line is interpreted.
 This was the lastest date on our server. We don't interpret
 all received lines because spam messages tend to contain bogus dates.
 
@@ -20,6 +20,11 @@ If no recieved line is found, you can enable a fallback
 mechanism to the "Date:" header in the configuration file.
 This is useful for correcting "Sent" items.
 
+
+By default the script runs in test mode and does not modify any messages.
+See the output of the "--help" command line switch
+how to activate the real update mode.
+
 Prerequisites:
 Python version 3 or later