diff -up system-switch-mail-2.0.1/switchmail.sh.orig system-switch-mail-2.0.1/switchmail.sh
--- system-switch-mail-2.0.1/switchmail.sh.orig	2018-04-03 17:19:25.867074610 +0200
+++ system-switch-mail-2.0.1/switchmail.sh	2018-04-03 17:20:02.608207996 +0200
@@ -2,9 +2,9 @@
 
 if [ -f /usr/share/system-switch-mail/system-switch-mail.py ] ; then
     export PYTHONPATH=/usr/share/system-switch-mail/
-    /usr/bin/python /usr/share/system-switch-mail/system-switch-mail.py
+    /usr/bin/python3 /usr/share/system-switch-mail/system-switch-mail.py
 elif [ -f ./system-switch-mail.py ] ; then
    export  PYTHONPATH=$PWD/
-   /usr/bin/python ./system-switch-mail.py
+   /usr/bin/python3 ./system-switch-mail.py
 fi