Set permissions on standard public dir

common/debian/postinst

@@ -89,6 +89,7 @@ if [ ! -e "/srv/$HOSTNAME" ] ; then
   mkdir -p /srv/$HOSTNAME/mailboxes/root
 
   chown -R sympl:sympl /srv/$HOSTNAME
+  chown -R www-data:www-data /srv/$HOSTNAME/public
 fi
 
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