SMTP
Simular respuesta 556 Domain Does Not Accept Mail
The destination domain does not accept mail and no forwarding address is available. The domain's DNS configuration (null MX record) explicitly indicates it does not receive email.
Ver referencia completa →1 Respuesta HTTP
HTTP/1.1 556 Domain Does Not Accept Mail
Content-Type: application/json
Date: Tue, 25 Feb 2026 12:00:00 GMT
Content-Length: 67
{
"error": "server_error",
"message": "Domain Does Not Accept Mail"
}
2 Probar con curl
curl -i https://httpbin.org/status/556
3 Devolver 556 Domain Does Not Accept Mail en tu framework
django
from django.http import JsonResponse
def my_view(request):
return JsonResponse(
{"error": "server_error", "message": "Domain Does Not Accept Mail"},
status=556,
)
flask
from flask import Flask, jsonify
app = Flask(__name__)
@app.route("/endpoint")
def my_endpoint():
return jsonify({"error": "server_error", "message": "Domain Does Not Accept Mail"}), 556
fastapi
from fastapi import FastAPI
from fastapi.responses import JSONResponse
app = FastAPI()
@app.get("/endpoint")
def my_endpoint():
return JSONResponse(
content={"error": "server_error", "message": "Domain Does Not Accept Mail"},
status_code=556,
)
express.js
// Express.js
app.get('/endpoint', (req, res) => {
res.status(556).json({"error": "server_error", "message": "Domain Does Not Accept Mail"});
});
spring boot
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.Map;
@RestController
public class MyController {
@GetMapping("/endpoint")
public ResponseEntity<Map<String, Object>> myEndpoint() {
return ResponseEntity
.status(556)
.body(Map.of("error", "domain_does_not_accept_mail",
"message", "Domain Does Not Accept Mail"));
}
}
go net/http
package main
import (
"encoding/json"
"net/http"
)
func myHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(556)
json.NewEncoder(w).Encode(map[string]string{
"error": "domain_does_not_accept_mail",
"message": "Domain Does Not Accept Mail",
})
}
ruby on rails
class MyController < ApplicationController
def my_action
render json: {"error": "server_error", "message": "Domain Does Not Accept Mail"},
status: :domain_does_not_accept_mail
end
end
asp.net core
// ASP.NET Core Minimal API
app.MapGet("/endpoint", () =>
Results.Json(
new { error = "domain_does_not_accept_mail", message = "Domain Does Not Accept Mail" },
statusCode: 556
)
);