diff --git a/osm-massmail/info.txt b/osm-massmail/info.txt
index 93f18ab..5c27b7b 100644
--- a/osm-massmail/info.txt
+++ b/osm-massmail/info.txt
@@ -1,4 +1,5 @@
-How to use these scripts:
+How to send mails to many OSM users?
+====================================
 
 1) generate a list of OSM usernames, that should be the target of a mail
 
@@ -22,3 +23,14 @@ How to use these scripts:
 
 7) click on each of the links in the local html file to send a single message
 
+
+
+How to get all active mappers of an area?
+=========================================
+
+1) download a snapshot of the region from http://geofabrik.de
+
+2) extract the users and sort them by the number of objects:
+	grep user= mecklenburg-vorpommern.osm | cut -d '"' -f 6 \
+		| sort | uniq -c | sort -nr
+