diff --git a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dockerapi/dockerapi.py b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dockerapi/dockerapi.py
index 20e9d0e..32824a2 100644
--- a/mailcow/src/mailcow-dockerized/data/Dockerfiles/dockerapi/dockerapi.py
+++ b/mailcow/src/mailcow-dockerized/data/Dockerfiles/dockerapi/dockerapi.py
@@ -227,29 +227,11 @@
 
   # api call: container_post - post_action: exec - cmd: system - task: mysql_upgrade
   def container_post__exec__system__mysql_upgrade(self, container_id):
-    for container in docker_client.containers.list(filters={"id": container_id}):
-      sql_return = container.exec_run(["/bin/bash", "-c", "/usr/bin/mysql_upgrade -uroot -p'" + os.environ['DBROOT'].replace("'", "'\\''") + "'\n"], user='mysql')
-      if sql_return.exit_code == 0:
-        matched = False
-        for line in sql_return.output.decode('utf-8').split("\n"):
-          if 'is already upgraded to' in line:
-            matched = True
-        if matched:
-          return jsonify(type='success', msg='mysql_upgrade: already upgraded', text=sql_return.output.decode('utf-8'))
-        else:
-          container.restart()
-          return jsonify(type='warning', msg='mysql_upgrade: upgrade was applied', text=sql_return.output.decode('utf-8'))
-      else:
-        return jsonify(type='error', msg='mysql_upgrade: error running command', text=sql_return.output.decode('utf-8'))
+    return jsonify(type='success', msg='mysql_upgrade: not touching fake MySQL', text='')
 
   # api call: container_post - post_action: exec - cmd: system - task: mysql_tzinfo_to_sql
   def container_post__exec__system__mysql_tzinfo_to_sql(self, container_id):
-    for container in docker_client.containers.list(filters={"id": container_id}):
-      sql_return = container.exec_run(["/bin/bash", "-c", "/usr/bin/mysql_tzinfo_to_sql /usr/share/zoneinfo | /bin/sed 's/Local time zone must be set--see zic manual page/FCTY/' | /usr/bin/mysql -uroot -p'" + os.environ['DBROOT'].replace("'", "'\\''") + "' mysql \n"], user='mysql')
-      if sql_return.exit_code == 0:
-        return jsonify(type='info', msg='mysql_tzinfo_to_sql: command completed successfully', text=sql_return.output.decode('utf-8'))
-      else:
-        return jsonify(type='error', msg='mysql_tzinfo_to_sql: error running command', text=sql_return.output.decode('utf-8'))
+    return jsonify(type='success', msg='mysql_tzinfo_to_sql: not touching fake MySQL', text='')
 
   # api call: container_post - post_action: exec - cmd: reload - task: dovecot
   def container_post__exec__reload__dovecot(self, container_id):
@@ -284,7 +266,7 @@
   def container_post__exec__sieve__print(self, container_id):
     if 'username' in request.json and 'script_name' in request.json:
       for container in docker_client.containers.list(filters={"id": container_id}):
-        cmd = ["/bin/bash", "-c", "/usr/bin/doveadm sieve get -u '" + request.json['username'].replace("'", "'\\''") + "' '" + request.json['script_name'].replace("'", "'\\''") + "'"]  
+        cmd = ["/bin/bash", "-c", "/usr/bin/doveadm sieve get -u '" + request.json['username'].replace("'", "'\\''") + "' '" + request.json['script_name'].replace("'", "'\\''") + "'"]
         sieve_return = container.exec_run(cmd)
         return exec_run_handler('utf8_text_only', sieve_return)
 
diff --git a/mailcow/src/mailcow-dockerized/data/conf/postfix/main.cf b/mailcow/src/mailcow-dockerized/data/conf/postfix/main.cf
index e8da794..3e4b2b1 100644
--- a/mailcow/src/mailcow-dockerized/data/conf/postfix/main.cf
+++ b/mailcow/src/mailcow-dockerized/data/conf/postfix/main.cf
@@ -16,7 +16,7 @@
 alias_maps = hash:/etc/aliases
 alias_database = hash:/etc/aliases
 relayhost =
-mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 [fe80::]/10 [fc00::]/7
+mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 172.22.1.0/24 [fe80::]/10 [fc00::]/7
 mailbox_size_limit = 0
 recipient_delimiter = +
 inet_interfaces = all
diff --git a/mailcow/src/mailcow-dockerized/docker-compose.yml b/mailcow/src/mailcow-dockerized/docker-compose.yml
index 2c9c93a..ff1e5eb 100644
--- a/mailcow/src/mailcow-dockerized/docker-compose.yml
+++ b/mailcow/src/mailcow-dockerized/docker-compose.yml
@@ -552,7 +552,7 @@
     driver: bridge
     driver_opts:
       com.docker.network.bridge.name: br-mailcow
-    enable_ipv6: true
+    enable_ipv6: false
     ipam:
       driver: default
       config: