diff --git a/acme.sh b/acme.sh
index f680e0fb..0cc52131 100755
--- a/acme.sh
+++ b/acme.sh
@@ -2222,40 +2222,40 @@ _send_signed_request() {
 
     _CACHED_NONCE="$(echo "$responseHeaders" | grep -i "Replay-Nonce:" | _head_n 1 | tr -d "\r\n " | cut -d ':' -f 2 | cut -d , -f 1)"
 
-    _body="$response"
-    if [ "$needbase64" ]; then
-      _body="$(echo "$_body" | _dbase64 multiline)"
-      _debug3 _body "$_body"
-    fi
-    _retryafter=$(echo "$responseHeaders" | grep -i "^Retry-After *: *[0-9]\+ *" | cut -d : -f 2 | tr -d ' ' | tr -d '\r')
-
-    if [ "$code" = '503' ] || [ "$_retryafter" ]; then
-      _sleep_overload_retry_sec=$_retryafter
-      if [ -z "$_sleep_overload_retry_sec" ]; then
-        _sleep_overload_retry_sec=5
+    if ! _startswith "$code" "2"; then
+      _body="$response"
+      if [ "$needbase64" ]; then
+        _body="$(echo "$_body" | _dbase64 multiline)"
+        _debug3 _body "$_body"
+      fi
+
+      _retryafter=$(echo "$responseHeaders" | grep -i "^Retry-After *: *[0-9]\+ *" | cut -d : -f 2 | tr -d ' ' | tr -d '\r')
+      if [ "$code" = '503' ]; then
+        _sleep_overload_retry_sec=$_retryafter
+        if [ -z "$_sleep_overload_retry_sec" ]; then
+          _sleep_overload_retry_sec=5
+        fi
+        if [ $_sleep_overload_retry_sec -le 600 ]; then
+          _info "It seems the CA server is currently overloaded, let's wait and retry. Sleeping $_sleep_overload_retry_sec seconds."
+          _sleep $_sleep_overload_retry_sec
+          continue
+        else
+          _info "The retryafter=$_retryafter is too large > 600, not retry anymore."
+        fi
       fi
-      if [ $_sleep_overload_retry_sec -le 600 ]; then
-        _info "It seems the CA server is currently overloaded, let's wait and retry. Sleeping $_sleep_overload_retry_sec seconds."
-        _sleep $_sleep_overload_retry_sec
+      if _contains "$_body" "JWS has invalid anti-replay nonce" || _contains "$_body" "JWS has an invalid anti-replay nonce"; then
+        _info "It seems the CA server is busy now, let's wait and retry. Sleeping $_sleep_retry_sec seconds."
+        _CACHED_NONCE=""
+        _sleep $_sleep_retry_sec
+        continue
+      fi
+      if _contains "$_body" "The Replay Nonce is not recognized"; then
+        _info "The replay Nonce is not valid, let's get a new one, Sleeping $_sleep_retry_sec seconds."
+        _CACHED_NONCE=""
+        _sleep $_sleep_retry_sec
         continue
-      else
-        _info "The retryafter=$_retryafter is too large > 600, not retry anymore."
-        return 1
       fi
     fi
-    if _contains "$_body" "JWS has invalid anti-replay nonce" || _contains "$_body" "JWS has an invalid anti-replay nonce"; then
-      _info "It seems the CA server is busy now, let's wait and retry. Sleeping $_sleep_retry_sec seconds."
-      _CACHED_NONCE=""
-      _sleep $_sleep_retry_sec
-      continue
-    fi
-    if _contains "$_body" "The Replay Nonce is not recognized"; then
-      _info "The replay Nonce is not valid, let's get a new one, Sleeping $_sleep_retry_sec seconds."
-      _CACHED_NONCE=""
-      _sleep $_sleep_retry_sec
-      continue
-    fi
-
     return 0
   done
   _info "Giving up sending to CA server after $MAX_REQUEST_RETRY_TIMES retries."