diff --git a/dnsapi/dns_dnsever.sh b/dnsapi/dns_dnsever.sh
index 5c8f37e4..4d14a127 100644
--- a/dnsapi/dns_dnsever.sh
+++ b/dnsapi/dns_dnsever.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 #Here is a sample custom api script.
 #This file name is "dns_myapi.sh"
@@ -21,7 +21,7 @@ dns_dnsever_add() {
 
   if [ -z "$DNSEVER_ID" ] || [ -z "$DNSEVER_PW" ]; then
     DNSEVER_ID=""
-    DNSEVER_ID=""
+    DNSEVER_PW=""
     _err "You don't specify dnsever.com ID or PW yet."
     _err "Please create you key and try again."
     return 1
@@ -31,8 +31,7 @@ dns_dnsever_add() {
   _saveaccountconf DNSEVER_ID "$DNSEVER_ID"
   _saveaccountconf DNSEVER_PW "$DNSEVER_PW"
 
-
-  dnsever_add_txt "$DNSEVER_ID" "$DNSEVER_PW" "$fulldomain" "$txtvalue"
+  dnsever_txt "add" "$DNSEVER_ID" "$DNSEVER_PW" "$fulldomain" "$txtvalue"
   return $?
 }
 
@@ -44,78 +43,203 @@ dns_dnsever_rm() {
   _info "Using dnsever"
   _debug fulldomain "$fulldomain"
   _debug txtvalue "$txtvalue"
-  dnsever_delete_txt "$DNSEVER_ID" "$DNSEVER_PW" "$fulldomain" "$txtvalue"
+
+  if [ -z "$DNSEVER_ID" ] || [ -z "$DNSEVER_PW" ]; then
+    DNSEVER_ID=""
+    DNSEVER_PW=""
+    _err "You don't specify dnsever.com ID or PW yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  #save the api key and email to the account conf file.
+  _saveaccountconf DNSEVER_ID "$DNSEVER_ID"
+  _saveaccountconf DNSEVER_PW "$DNSEVER_PW"
+
+  dnsever_txt "delete" "$DNSEVER_ID" "$DNSEVER_PW" "$fulldomain" "$txtvalue"
   return $?
 }
 
 ####################  Private functions below ##################################
 
-dnsever_add_txt(){
-  local login_id="$1"; local login_password="$2"; local fulldomain="$3"; local new_txt="$4"
-  local n=$(echo $fulldomain |  grep -o '\.'  | wc -l)
-  local f=$(seq 1 $(($n - 1)) | paste -d, -s -)
-  local subname=$(echo $fulldomain | cut -f $f -d .)
-  local user_domain=$(echo $fulldomain | cut -f $n,$(( $n + 1 )) -d .)
+dnsever_txt(){
+  action="$1"; login_id="$2"; login_password="$3"; fulldomain="$4"; txt="$5"
+
+  _inithttp
 
-  curl -sS -k -c /tmp/dnsever.txt -d "login_id=$login_id" -d "login_password=$login_password" https://kr.dnsever.com/index.html > /tmp/dnsever.html
-  local skey=$(curl -s -k -b /tmp/dnsever.txt https://kr.dnsever.com/start.html | grep skey | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p")
+  if [ "$_ACME_CURL" ] && [ "${ACME_USE_WGET:-0}" = "0" ]; then
+    httpmethod_save="POST -c /tmp/dnsever.txt"
+    httpmethod_load="POST -b /tmp/dnsever.txt"
+  else
+    httpmethod_save="POST --load-cookies /tmp/dnsever.txt"
+    httpmethod_load="POST --save-cookies /tmp/dnsever.txt"
+  fi
 
-  _info "dnsever_add_txt skey=$skey user_domain=$user_domain selected_menu=edittxt command=add_txt subname=$subname new_txt=$new_txt"
+  response=$(_post "login_id=$login_id&login_password=$login_password" "https://kr.dnsever.com/index.html" "" "$httpmethod_save")
+  if [ $? != 0 -o -z "$response" ]; then
+    _err "dnsever_txt:$action ERROR login failed. Please check https://kr.dnsever.com/index.html with login_id=$login_id login_password=$login_password"
+    dnsever_logout "" "$httpmethod_load"
+    return 1
+  fi
 
-  if [ -z "$skey" -o -z "$user_domain" -o -z "$subname" -o -z "$new_txt" ]; then
-    _err "dnsever_add_txt ERROR skey or user_domain or subname or new_txt was empty"
+  response=$(_post "" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+  if [ $? != 0 -o -z "$response" ]; then
+    _err "dnsever_txt:$action ERROR login failed. Please check https://kr.dnsever.com/start.html after login"
+    dnsever_logout "" "$httpmethod_load"
+    return 1
+  fi
+ 
+  skey=$(printf "%s\n" "$response" | grep skey | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p")
+  if [ -z "$skey" ]; then
+    _err "dnsever_txt:$action ERROR login failed with login_id=$login_id login_password=$login_password"
+    dnsever_logout "$skey" "$httpmethod_load"
     return 1
   fi
 
-  curl -sS -k -b /tmp/dnsever.txt -d "skey=$skey" -d "user_domain=$user_domain" -d 'selected_menu=edittxt' \
-  -d "subname=$subname" -d "new_txt=$new_txt" -d 'command=add_txt' \
-  "https://kr.dnsever.com/start.html?user_domain=$user_domain&selected_menu=edittxt" > /tmp/dnsever.html
-  return $?
-}
+  user_domain=$(dnsever_select_user_domain "$fulldomain" "$response")
 
-dnsever_delete_txt(){
-  local login_id="$1"; local login_password="$2"; local fulldomain="$3"; local txtvalue="$4"
-  local n=$(echo $fulldomain |  grep -o '\.'  | wc -l)
-  local f=$(seq 1 $(($n - 1)) | paste -d, -s -)
-  local subname=$(echo $fulldomain | cut -f $f -d .)
-  local user_domain=$(echo $fulldomain | cut -f $n,$(( $n + 1 )) -d .)
+  if [ -z "$user_domain" ]; then
+    _err "dnsever_txt:$action ERROR no matching domain in DNSEver"
+    dnsever_logout "$skey" "$httpmethod_load"
+    return 1
+  fi
 
+  if [ "$action" = "add" ]; then
 
-  curl -sS -k -c /tmp/dnsever.txt -d "login_id=$login_id" -d "login_password=$login_password" https://kr.dnsever.com/index.html > /tmp/dnsever.html
-  curl -sS -k -b /tmp/dnsever.txt "https://kr.dnsever.com/start.html?user_domain=$user_domain&selected_menu=edittxt" > /tmp/dnsever.html
+    subname=$(echo $fulldomain | sed "s/\.$user_domain\$//")
 
-  local skey=$(cat /tmp/dnsever.html | grep skey | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p")
+    if [ -z "$subname" -o -z "$txt" ]; then
+      _err "dnsever_txt ERROR subname=$subname or txt=$txt is empty"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
 
-  _info "dnsever_delete_txt skey=$skey subname=$subname user_domain=$user_domain"
+    _info "dnsever_txt:$action skey=$skey user_domain=$user_domain selected_menu=edittxt command=add_txt subname=$subname txt=$txt"
 
-  if [ -z "$skey" -o -z "$user_domain" -o -z "$subname" ]; then
-    _err "dnsever_delete_txt ERROR skey or user_domain or subname was empty"
-    return 1
+    response=$(_post "skey=$skey&user_domain=$user_domain&selected_menu=edittxt" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+    if [ $? != 0 -o -z "$response" ]; then
+      _err "dnsever_txt:$action ERROR failed to get TXT records from DNSEver"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    check=$(dnsever_check "$fulldomain" "$txt" "$response")
+    if [ $? = 0 -o -n "$check" ]; then
+      _err "dnsever_txt:$action ERROR $fulldomain=$txt already exists"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    response=$(_post "skey=$skey&user_domain=$user_domain&selected_menu=edittxt&command=add_txt&subname=$subname&new_txt=$txt" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+    if [ $? != 0 -o -z "$response" ]; then
+      _err "dnsever_txt:$action ERROR failed to add_text $fulldomain=$txt"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    check=$(dnsever_check "$fulldomain" "$txt" "$response")
+    if [ $? != 0 -o -z "$check" ]; then
+      _err "dnsever_txt:$action ERROR failed to get newly added $fulldomain=$txt"
+      dnsever_logout "$skey" "$httpmethod_load"
+    fi
+
+  elif [ "$action" = "delete" ]; then
+
+    response=$(_post "skey=$skey&user_domain=$user_domain&selected_menu=edittxt" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+    if [ $? != 0 -o -z "$response" ]; then
+      _err "dnsever_txt:$action ERROR failed to get TXT records from DNSEver"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    check=$(dnsever_check "$fulldomain" "$txt" "$response")
+    if [ $? != 0 -o -z "$check" ]; then
+      _err "dnsever_txt:$action ERROR $fulldomain=$txt does not exists"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    _info "dnsever_txt:$action skey=$skey user_domain=$user_domain selected_menu=edittxt command=delete_txt$(echo $check|sed 's/\&/ /g')"
+
+    response=$(_post "skey=$skey&user_domain=$user_domain&selected_menu=edittxt&command=delete_txt&$check" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+    if [ $? != 0 -o -z "&response" ]; then
+      _err "dnsever_txt:$action ERROR failed to delete $fulldomain=$txt from DNSEver"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+  
+    response=$(_post "skey=$skey&user_domain=$user_domain&selected_menu=edittxt" "https://kr.dnsever.com/start.html" "" "$httpmethod_load")
+    if [ $? != 0 -o -z "&response" ]; then
+      _err "dnsever_txt:$action ERROR failed to get $fulldomain=$txt from DNSEver"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+    check=$(dnsever_check "$fulldomain" "$txt" "$response")
+    if [ $? = 0 -a -n "$check" ]; then
+      _err "dnsever_txt:$action ERROR $fulldomain=$txt still exists"
+      dnsever_logout "$skey" "$httpmethod_load"
+      return 1
+    fi
+
+  else
+    _err "dnsever_txt:$action action should be add or delete"
   fi
 
-  local matched=$(grep "$fulldomain" /tmp/dnsever.html | sed -n -e "s/^.*name=['\"]\(.*\)['\"].*value.*$/\1/p" | sed 's/domain_for_txt_//g')
-  local n; local checked; local input;
+  dnsever_logout "$skey" "$httpmethod_load"
+  return 0 
+}
+
+dnsever_logout(){
+  skey="$1"; httpmethod_load="$2"
+
+  if [ -n "$skey" -a -n "$httpmethod_load" ]; then
+    response=$(_post "skey=$skey" "https://kr.dnsever.com/logout.php" "" "$httpmethod_load")  
+  fi
+  if [ -e /tmp/dnsever.txt ]; then
+    rm -f /tmp/dnsever.txt
+  fi
+}
+
+dnsever_select_user_domain(){
+  fulldomain="$1"; response="$2"
+
+  domains=$(printf "%s\n" "$response" | grep OPTION | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p" | grep -v "^$")
+  nmax=0; selected=""
+  for domain in $domains; do
+    if echo "$fulldomain" | grep -q "$domain\$"; then
+      n=$(echo $domain |  wc -c)
+      if [ $n -gt $nmax ]; then
+        nmax=$n
+        selected="$domain"
+      fi
+    fi
+  done
+  echo "$selected"
+}
+
+dnsever_check(){
+  fulldomain="$1"
+  old_txt="$1"
+  response="$3"
+
+  matched=$(printf "%s\n" "$response" | grep "$fulldomain" | sed -n -e "s/^.*name=['\"]\(.*\)['\"].*value.*$/\1/p" | sed 's/domain_for_txt_//g')
+
+  check=""
   for n in $matched; do
-    local seq=$(cat /tmp/dnsever.html | grep seq_$n | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p")
-    local old_txt=$(cat /tmp/dnsever.html | grep old_txt_$n | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*id=.*$/\1/p")
+    seq=$(printf "%s\n" "$response" | grep seq_$n | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*/\1/p")
+    old_txt=$(printf "%s\n" "$response" | grep old_txt_$n | sed -n -e "s/^.*value=['\"]\(.*\)['\"].*id=.*$/\1/p")
     if [ "$txtvalue" != "$old_txt" ]; then
-      _info "dnsever_delete_txt skip deleting seq=$seq fulldomain=$fulldomain due to old_txt=$old_txt was different from txtvalue=$txtvalue skip"
+      _info "dnsever_check skip deleting seq=$seq fulldomain=$fulldomain due to old_txt=$old_txt was different from txtvalue=$txtvalue skip"
       continue
     fi
-    checked="$checked,$n"
-    input="$input -d domain_for_txt_$n=$fulldomain -d seq_$n=$seq -d old_txt_$n=$old_txt"
+    check="$input&check[]=$n&domain_for_txt_$n=$fulldomain&seq_$n=$seq&old_txt_$n=$old_txt"
   done
-  local check=$(echo "$checked" | sed 's/^,//')
-
-  _info "dnsever_delete_txt skey=$skey user_domain=$user_domain selected_menu=edittxt command=delete_txt check[]=$check $input"
 
-  if [ -z "$skey" -o -z "$user_domain" -o -z "$check" -o -z "$input" ]; then
-    _err "dnsever_delete_txt ERROR skey or user_domain or check[] or other parameters was empty. Maybe $fulldomain=$txtvalue was not found."
+  if [ -z "$check" ]; then
     return 1
   fi
 
-  curl -sS -k -b /tmp/dnsever.txt -d "skey=$skey" -d "user_domain=$user_domain" -d 'selected_menu=edittxt' \
-  -d "check[]=$check" $input -d 'command=delete_txt' \
-  "https://kr.dnsever.com/start.html?user_domain=$user_domain&selected_menu=edittxt" > /tmp/dnsever.html
-  return $?
+  echo "$check"
+  return 0
 }