diff --git a/dnsapi/dns_schlundtech.sh b/dnsapi/dns_schlundtech.sh
deleted file mode 100644
index 12408633..00000000
--- a/dnsapi/dns_schlundtech.sh
+++ /dev/null
@@ -1,261 +0,0 @@
-#!/usr/bin/env sh
-# -*- mode: sh; tab-width: 2; indent-tabs-mode: s; coding: utf-8 -*-
-
-# Schlundtech DNS API
-# Author: mod242
-# Created: 2019-40-29
-# Completly based on the autoDNS xml api wrapper by auerswald@gmail.com
-#
-#     export SCHLUNDTECH_USER="username"
-#     export SCHLUNDTECH_PASSWORD="password"
-#
-# Usage:
-#     acme.sh --issue --dns dns_schlundtech -d example.com
-
-SCHLUNDTECH_API="https://gateway.schlundtech.de"
-
-# Arguments:
-#   txtdomain
-#   txt
-dns_schlundtech_add() {
-  fulldomain="$1"
-  txtvalue="$2"
-
-  SCHLUNDTECH_USER="${SCHLUNDTECH_USER:-$(_readaccountconf_mutable SCHLUNDTECH_USER)}"
-  SCHLUNDTECH_PASSWORD="${SCHLUNDTECH_PASSWORD:-$(_readaccountconf_mutable SCHLUNDTECH_PASSWORD)}"
-  
-  if [ -z "$SCHLUNDTECH_USER" ] || [ -z "$SCHLUNDTECH_PASSWORD" ]; then
-    _err "You didn't specify schlundtech user and password."
-    return 1
-  fi
-
-  _saveaccountconf_mutable SCHLUNDTECH_USER "$SCHLUNDTECH_USER"
-  _saveaccountconf_mutable SCHLUNDTECH_PASSWORD "$SCHLUNDTECH_PASSWORD"
-  
-  _debug "First detect the root zone"
-
-  if ! _get_autodns_zone "$fulldomain"; then
-    _err "invalid domain"
-    return 1
-  fi
-
-  _debug _sub_domain "$_sub_domain"
-  _debug _zone "$_zone"
-  _debug _system_ns "$_system_ns"
-
-  _info "Adding TXT record"
-
-  autodns_response="$(_autodns_zone_update "$_zone" "$_sub_domain" "$txtvalue" "$_system_ns")"
-
-  if [ "$?" -eq "0" ]; then
-    _info "Added, OK"
-    return 0
-  fi
-
-  return 1
-}
-
-# Arguments:
-#   txtdomain
-#   txt
-dns_schlundtech_rm() {
-  fulldomain="$1"
-  txtvalue="$2"
-
-  SCHLUNDTECH_USER="${SCHLUNDTECH_USER:-$(_readaccountconf_mutable SCHLUNDTECH_USER)}"
-  SCHLUNDTECH_PASSWORD="${SCHLUNDTECH_PASSWORD:-$(_readaccountconf_mutable SCHLUNDTECH_PASSWORD)}"
-  
-  if [ -z "$SCHLUNDTECH_USER" ] || [ -z "$SCHLUNDTECH_PASSWORD" ]; then
-    _err "You didn't specify schlundtech user and password."
-    return 1
-  fi
-
-  _debug "First detect the root zone"
-
-  if ! _get_autodns_zone "$fulldomain"; then
-    _err "zone not found"
-    return 1
-  fi
-
-  _debug _sub_domain "$_sub_domain"
-  _debug _zone "$_zone"
-  _debug _system_ns "$_system_ns"
-
-  _info "Delete TXT record"
-
-  autodns_response="$(_autodns_zone_cleanup "$_zone" "$_sub_domain" "$txtvalue" "$_system_ns")"
-
-  if [ "$?" -eq "0" ]; then
-    _info "Deleted, OK"
-    return 0
-  fi
-
-  return 1
-}
-
-####################  Private functions below ##################################
-
-# Arguments:
-#   fulldomain
-# Returns:
-#   _sub_domain=_acme-challenge.www
-#   _zone=domain.com
-#   _system_ns
-_get_autodns_zone() {
-  domain="$1"
-
-  i=2
-  p=1
-
-  while true; do
-    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
-    _debug h "$h"
-
-    if [ -z "$h" ]; then
-      # not valid
-      return 1
-    fi
-
-    autodns_response="$(_autodns_zone_inquire "$h")"
-
-    if [ "$?" -ne "0" ]; then
-      _err "invalid domain"
-      return 1
-    fi
-
-    if _contains "$autodns_response" "<summary>1</summary>" >/dev/null; then
-      _zone="$(echo "$autodns_response" | _egrep_o '<name>[^<]*</name>' | cut -d '>' -f 2 | cut -d '<' -f 1)"
-      _system_ns="$(echo "$autodns_response" | _egrep_o '<system_ns>[^<]*</system_ns>' | cut -d '>' -f 2 | cut -d '<' -f 1)"
-      _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
-      return 0
-    fi
-
-    p=$i
-    i=$(_math "$i" + 1)
-  done
-
-  return 1
-}
-
-_build_request_auth_xml() {
-  printf "<auth>
-    <user>%s</user>
-    <password>%s</password>
-    <context>10</context>
-  </auth>" "$SCHLUNDTECH_USER" "$SCHLUNDTECH_PASSWORD"
-}
-
-# Arguments:
-#   zone
-_build_zone_inquire_xml() {
-  printf "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
-  <request>
-    %s
-    <task>
-      <code>0205</code>
-      <view>
-        <children>1</children>
-        <limit>1</limit>
-      </view>
-      <where>
-        <key>name</key>
-        <operator>eq</operator>
-        <value>%s</value>
-      </where>
-    </task>
-  </request>" "$(_build_request_auth_xml)" "$1"
-}
-
-# Arguments:
-#   zone
-#   subdomain
-#   txtvalue
-#   system_ns
-_build_zone_update_xml() {
-  printf "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
-  <request>
-    %s
-    <task>
-      <code>0202001</code>
-      <default>
-        <rr_add>
-          <name>%s</name>
-          <ttl>600</ttl>
-          <type>TXT</type>
-          <value>%s</value>
-        </rr_add>
-      </default>
-      <zone>
-        <name>%s</name>
-        <system_ns>%s</system_ns>
-      </zone>
-    </task>
-  </request>" "$(_build_request_auth_xml)" "$2" "$3" "$1" "$4"
-}
-
-# Arguments:
-#   zone
-_autodns_zone_inquire() {
-  request_data="$(_build_zone_inquire_xml "$1")"
-  autodns_response="$(_autodns_api_call "$request_data")"
-  ret="$?"
-
-  printf "%s" "$autodns_response"
-  return "$ret"
-}
-
-# Arguments:
-#   zone
-#   subdomain
-#   txtvalue
-#   system_ns
-_autodns_zone_update() {
-  request_data="$(_build_zone_update_xml "$1" "$2" "$3" "$4")"
-  autodns_response="$(_autodns_api_call "$request_data")"
-  ret="$?"
-
-  printf "%s" "$autodns_response"
-  return "$ret"
-}
-
-# Arguments:
-#   zone
-#   subdomain
-#   txtvalue
-#   system_ns
-_autodns_zone_cleanup() {
-  request_data="$(_build_zone_update_xml "$1" "$2" "$3" "$4")"
-  # replace 'rr_add>' with 'rr_rem>' in request_data
-  request_data="$(printf -- "%s" "$request_data" | sed 's/rr_add>/rr_rem>/g')"
-  autodns_response="$(_autodns_api_call "$request_data")"
-  ret="$?"
-
-  printf "%s" "$autodns_response"
-  return "$ret"
-}
-
-# Arguments:
-#   request_data
-_autodns_api_call() {
-  request_data="$1"
-
-  _debug request_data "$request_data"
-
-  autodns_response="$(_post "$request_data" "$SCHLUNDTECH_API")"
-  ret="$?"
-
-  _debug autodns_response "$autodns_response"
-
-  if [ "$ret" -ne "0" ]; then
-    _err "error"
-    return 1
-  fi
-
-  if _contains "$autodns_response" "<type>success</type>" >/dev/null; then
-    _info "success"
-    printf "%s" "$autodns_response"
-    return 0
-  fi
-
-  return 1
-}