diff --git a/.gitignore b/.gitignore
index 3c5d5a8..27b2107 100644
--- a/.gitignore
+++ b/.gitignore
@@ -213,3 +213,7 @@ flycheck_*.el
 
 /__simulate_fail.json
 /mailing_list.yaml
+
+.vscode/
+
+*.code-workspace
diff --git a/parameters.yaml b/parameters.yaml
index d351b72..93c978d 100644
--- a/parameters.yaml
+++ b/parameters.yaml
@@ -118,7 +118,10 @@ data_channels: ["HHZ", "HHN", "HHE"]
 
 # ---------------------------------------- OPTIONAL PARAMETERS ---------------------------------------------------------
 # deactivate powbox surveillance for stations (e.g. for solar powered), key: station, value: status message (abbr.)
-no_pbox_stations: {'GR33': 'SOL'}
+no_pbox_stations: {'GR33': 'SOL', 'GR27B': 'DCN', 'RP01': 'noPBox', 'RP02': 'noPBox', 'RP03': 'noPBox', 'RP04': 'noPBox', 'RP05B': 'noPBox', 'RP06': 'noPBox', 'RP07': 'noPBox', 'RP08': 'noPBox'}
+
+# deactivate mass position surveillance for stations without connected mass channels (e.g. STS-2 instruments), key: station, value: status message (abbr.)
+no_mass_stations: {'BIA': 'DCN', 'KNEZ': 'DCN', 'KRUS': 'DCN', 'OHR': 'DCN', 'OTOV': 'DCN', 'SKO': 'DCN', 'STIP': 'DCN', 'VAY': 'DCN', 'ZUPA': 'DCN'}
 
 # add links to html table with specified key as column and value as relative link, interpretable string parameters:
 # nw (e.g. 1Y), st (e.g. GR01A), nwst_id (e.g. 1Y.GR01A)
@@ -132,7 +135,7 @@ add_links:
 add_global_links:
   # for example: - {"text": "our homepage", "URL": "https://www.rub.de"}
   - {"text": "show recent events on map",
-     "URL": "https://fdsnws.geophysik.ruhr-uni-bochum.de/map/?lat=39.5&lon=21&zoom=7&baselayer=mapnik"}
+     "URL": "https://fdsnws.geophysik.ruhr-uni-bochum.de/map/?lat=39.5&lon=21&zoom=7&baselayer=osm"}
 
 # html logo at page bottom (path relative to html directory)
 html_logo: "logo.png"
@@ -142,14 +145,14 @@ EMAIL:
   # specify mail server and credentials
   # port, auth_type, user and password are only required if mailserver is not set to "localhost"
   # user and password can be set to "ENV" or "DOCKER" to read from environment variables or docker secrets
-  mailserver: "smtp.rub.de"           # mail server
+  mailserver: "smtp.example.org"      # mail server
   auth_type: "SSL"                    # mail authentication type, can be "SSL", "TLS" or "None"
   port: 465                           # mail port, default 465 for SSL, 587 for TLS
   user: "DOCKER"                      # mail user, read from environment variable if set to "ENV" or from docker secret if set to "DOCKER"
   password: "DOCKER"                  # mail password, read from environment variable if set to "ENV" or from docker secret if set to "DOCKER"
   # specify mail recipients, sender and blacklists
-  addresses: ["marcel.paffrath@rub.de", "kasper.fischer@rub.de"]  # list of mail addresses for info mails
-  sender: "RUB SeisObs <seisobs@ruhr-uni-bochum.de>"              # mail sender
+  addresses: ["test@example.org"]  # list of mail addresses for info mails
+  sender: "<test@example.org>"              # mail sender
   stations_blacklist: []                                          # do not send emails for specific stations
   networks_blacklist: []                                          # do not send emails for specific network
   # specify recipients for single stations in a yaml: key = email-address, val = station list (e.g. [1Y.GR01, 1Y.GR02])
diff --git a/survBot.py b/survBot.py
index bd4fe70..391f86e 100755
--- a/survBot.py
+++ b/survBot.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-__version__ = '0.2-docker'
-__author__ = 'Marcel Paffrath <marcel.paffrath@rub.de>'
+__version__ = '0.3'
+__author__ = ['Marcel Paffrath <marcel.paffrath@rub.de>', 'Kasper D. Fischer <kasper.fischer@rub.de>']
 
 import os
 import io
@@ -595,6 +595,7 @@ class StationQC(object):
         self.status_track = status_track
 
         self.powbox_active = self.is_pbox_activated_check()
+        self.mass_active = self.is_mass_activated_check()
 
         self.start()
 
@@ -1080,6 +1081,11 @@ class StationQC(object):
         """ Analyse datalogger mass channels. """
         key = 'mass'
 
+        # skip processing if mass is not active
+        if not self.mass_active:
+            self.set_mass_inactive_error(key)
+            return
+        
         # build stream with all channels
         st = Stream()
         for channel in channels:
@@ -1341,6 +1347,12 @@ class StationQC(object):
         msg = self.parameters.get('no_pbox_stations')[self.station]
         self.error(key, detailed_message=f'PowBox not connected', disc=msg)
 
+    def is_mass_activated_check(self):
+        return self.station not in self.parameters.get('no_mass_stations', [])
+
+    def set_mass_inactive_error(self, key):
+        msg = self.parameters.get('no_mass_stations')[self.station]
+        self.error(key, detailed_message=f'Mass channels not connected', disc=msg)
 
 class Status(object):
     """ Basic Status class. All status classes are derived from this class."""