diff --git a/notify/mail.sh b/notify/mail.sh
index 3dfef0be..949e8b5c 100644
--- a/notify/mail.sh
+++ b/notify/mail.sh
@@ -1,6 +1,9 @@
 #!/usr/bin/env sh
 
-# support local mail app
+#Support local mail app
+
+#MAIL_FROM="yyyy@gmail.com"
+#MAIL_TO="yyyy@gmail.com"
 
 mail_send() {
   _subject="$1"
@@ -10,6 +13,61 @@ mail_send() {
   _debug "_content" "$_content"
   _debug "_statusCode" "$_statusCode"
 
-  _err "Not implemented yet."
-  return 1
+  if _exists "sendmail"; then
+    _MAIL_BIN="sendmail"
+  elif _exists "mail"; then
+    _MAIL_BIN="mail"
+  else
+    _err "Please install mail or sendmail first."
+    return 1
+  fi
+
+  MAIL_FROM="${MAIL_FROM:-$(_readaccountconf_mutable MAIL_FROM)}"
+  if [ -z "$MAIL_FROM" ]; then
+    MAIL_FROM="$USER@$(hostname -f)"
+    _info "The MAIL_FROM is not set, so use the default value: $MAIL_FROM"
+  fi
+  _saveaccountconf_mutable MAIL_FROM "$MAIL_FROM"
+
+  MAIL_TO="${MAIL_TO:-$(_readaccountconf_mutable MAIL_TO)}"
+  if [ -z "$MAIL_TO" ]; then
+    MAIL_TO="$(_readaccountconf ACCOUNT_EMAIL)"
+    _info "The MAIL_TO is not set, so use the account email: $MAIL_TO"
+  fi
+  _saveaccountconf_mutable MAIL_TO "$MAIL_TO"
+
+  subject="=?UTF-8?B?$(echo "$_subject" | _base64)?="
+  result=$({ _mail_body | _mail_send; } 2>&1)
+
+  if [ $? -ne 0 ]; then
+    _debug "mail send error."
+    _err "$result"
+    return 1
+  fi
+
+  _debug "mail send success."
+  return 0
+}
+
+_mail_send() {
+  case "$_MAIL_BIN" in
+    sendmail)
+      sendmail -f "$MAIL_FROM" "$MAIL_TO"
+      ;;
+    mail)
+      mail -s "$subject" -a "From:$MAIL_FROM" -a "Content-Type:text/plain; charset=utf-8" "$MAIL_TO"
+      ;;
+  esac
+}
+
+_mail_body() {
+  if [ "$_MAIL_BIN" = "sendmail" ]; then
+    echo "From: $MAIL_FROM"
+    echo "To: $MAIL_TO"
+    echo "Subject: =?UTF-8?B?$(echo "$_subject" | _base64)?="
+    echo "Content-Type: text/plain; charset=utf-8"
+    echo
+  fi
+
+  echo "$_content"
 }
diff --git a/notify/sendmail.sh b/notify/sendmail.sh
deleted file mode 100644
index 7c253e9c..00000000
--- a/notify/sendmail.sh
+++ /dev/null
@@ -1,59 +0,0 @@
-#!/usr/bin/env sh
-
-#Support sendmail
-
-#SENDMAIL_BIN="sendmail"
-#SENDMAIL_FROM="yyyy@gmail.com"
-#SENDMAIL_TO="yyyy@gmail.com"
-
-sendmail_send() {
-  _subject="$1"
-  _content="$2"
-  _statusCode="$3" #0: success, 1: error 2($RENEW_SKIP): skipped
-  _debug "_subject" "$_subject"
-  _debug "_content" "$_content"
-  _debug "_statusCode" "$_statusCode"
-
-  SENDMAIL_BIN="${SENDMAIL_BIN:-$(_readaccountconf_mutable SENDMAIL_BIN)}"
-  if [ -z "$SENDMAIL_BIN" ]; then
-    SENDMAIL_BIN="sendmail"
-    _info "The SENDMAIL_BIN is not set, so use the default value: $SENDMAIL_BIN"
-  fi
-  if ! _exists "$SENDMAIL_BIN"; then
-    _err "Please install sendmail first."
-    return 1
-  fi
-  _saveaccountconf_mutable SENDMAIL_BIN "$SENDMAIL_BIN"
-
-  SENDMAIL_FROM="${SENDMAIL_FROM:-$(_readaccountconf_mutable SENDMAIL_FROM)}"
-  if [ -z "$SENDMAIL_FROM" ]; then
-    SENDMAIL_FROM="$USER@$(hostname -f)"
-    _info "The SENDMAIL_FROM is not set, so use the default value: $SENDMAIL_FROM"
-  fi
-  _saveaccountconf_mutable SENDMAIL_FROM "$SENDMAIL_FROM"
-
-  SENDMAIL_TO="${SENDMAIL_TO:-$(_readaccountconf_mutable SENDMAIL_TO)}"
-  if [ -z "$SENDMAIL_TO" ]; then
-    SENDMAIL_TO="$(_readaccountconf ACCOUNT_EMAIL)"
-    _info "The SENDMAIL_TO is not set, so use the account email: $SENDMAIL_TO"
-  fi
-  _saveaccountconf_mutable SENDMAIL_TO "$SENDMAIL_TO"
-
-  subject="=?UTF-8?B?$(echo "$_subject" | _base64)?="
-  error=$({ echo "From: $SENDMAIL_FROM
-To: $SENDMAIL_TO
-Subject: $subject
-Content-Type: text/plain; charset=utf-8
-
-$_content
-" | "$SENDMAIL_BIN" -f "$SENDMAIL_FROM" "$SENDMAIL_TO"; } 2>&1)
-
-  if [ $? -ne 0 ]; then
-    _debug "sendmail send error."
-    _err "$error"
-    return 1
-  fi
-
-  _debug "sendmail send success."
-  return 0
-}