SPF Validator API

OnlineCredit Usage:1 per callLive Data

avg: 379ms|p50: 359ms|p75: 393ms|p90: 434ms|p99: 515ms

SPF Validator checks the Sender Policy Framework (SPF) DNS record for a domain to verify if it’s valid and optionally whether a given IP address is authorized to send emails for that domain.

The SPF Validator API provides reliable and fast access to spf validator data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.

To use SPF Validator, you need an API key. You can get one by creating a free account and visiting your dashboard.

Live Test SPF Validator API

GET Endpoint

URL

https://api.apiverve.com/v1/spfvalidator

Code Examples

Here are examples of how to call the SPF Validator API in different programming languages:

cURL Request

curl -X GET \
  "https://api.apiverve.com/v1/spfvalidator?domain=myspace.com" \
  -H "X-API-Key: your_api_key_here"

JavaScript (Fetch API)

const response = await fetch('https://api.apiverve.com/v1/spfvalidator?domain=myspace.com', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

Python (Requests)

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/spfvalidator?domain=myspace.com', headers=headers)

data = response.json()
print(data)

Node.js (Native HTTPS)

const https = require('https');
const url = require('url');

const options = {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
};

const req = https.request('https://api.apiverve.com/v1/spfvalidator?domain=myspace.com', options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(JSON.parse(data)));
});

req.end();

PHP (cURL)

<?php

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/spfvalidator?domain=myspace.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-API-Key: your_api_key_here',
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

?>

Go (net/http)

package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/spfvalidator?domain=myspace.com", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

Ruby (Net::HTTP)

require 'net/http'
require 'json'

uri = URI('https://api.apiverve.com/v1/spfvalidator?domain=myspace.com')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'

response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))

C# (HttpClient)

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");

        var response = await client.GetAsync("https://api.apiverve.com/v1/spfvalidator?domain=myspace.com");
        response.EnsureSuccessStatusCode();

        var responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
    }
}

Authentication

The SPF Validator API requires authentication via API key. Include your API key in the request header:

Required Header

X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the SPF Validator API directly in your browser with live requests and responses.

Live Test SPF Validator APITry it free with instant results - no signup required

Parameters

The SPF Validator API supports multiple query options. Use one of the following:

Option 1: Validate SPF Record & Test IP Authorization

Parameter	Type	Required	Description	Default	Example
`domain`	string	`required`	The domain to validate the SPF record for Format: `domain` (e.g., `myspace.com`)	-	`myspace.com`

Option 2: Test IP Authorization

Parameter	Type	Required	Description	Default	Example
`domain`	string	`required`	The domain to validate the SPF record for Format: `domain` (e.g., `myspace.com`)	-	`myspace.com`
`ip`	string	`required`	IP address to test against the domain's SPF policy	-	`192.0.2.1`

Response

The SPF Validator API returns responses in JSON, XML, YAML, and CSV formats:

Example Responses

JSON Response

200 OK

{
  "status": "ok",
  "error": null,
  "data": {
    "host": "myspace.com",
    "has_spf_record": true,
    "dns_lookups_num": 9,
    "spf_record": "v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all",
    "spf_records_list": [
      {
        "origin": "myspace.com",
        "record": "v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all",
        "chars_num": 637,
        "use_macro": false,
        "domains": [
          "_netblocks.mimecast.com"
        ],
        "authorized_ips": {
          "ipv4": [
            "63.208.226.34",
            "204.16.32.0/22",
            "67.134.143.0/24",
            "216.205.243.0/24",
            "34.85.156.5/32",
            "35.245.108.108/32",
            "34.86.129.193/32",
            "34.86.134.94/32",
            "34.85.222.234/32",
            "34.86.176.234/32",
            "34.86.125.212/32",
            "34.85.224.60/32",
            "34.86.160.49/32",
            "35.245.64.166/32",
            "35.188.226.11/32",
            "34.86.208.228/32",
            "34.85.216.144/32",
            "35.221.22.153/32",
            "34.86.137.108/32",
            "34.86.51.35/32",
            "34.150.221.40/32",
            "34.85.216.70/32",
            "34.86.37.191/32",
            "34.85.214.215/32",
            "35.236.234.82/32",
            "34.86.161.241/32",
            "216.32.181.16",
            "216.178.32.0/20",
            "168.235.224.0/24"
          ]
        }
      },
      {
        "origin": "_netblocks.mimecast.com",
        "record": "v=spf1 include:eu._netblocks.mimecast.com include:us._netblocks.mimecast.com include:za._netblocks.mimecast.com include:de._netblocks.mimecast.com include:au._netblocks.mimecast.com include:ca._netblocks.mimecast.com include:usb._netblocks.mimecast.com ~all",
        "chars_num": 257,
        "use_macro": false,
        "domains": [
          "eu._netblocks.mimecast.com",
          "us._netblocks.mimecast.com",
          "za._netblocks.mimecast.com",
          "de._netblocks.mimecast.com",
          "au._netblocks.mimecast.com",
          "ca._netblocks.mimecast.com",
          "usb._netblocks.mimecast.com"
        ]
      },
      {
        "origin": "eu._netblocks.mimecast.com",
        "record": "v=spf1 ip4:195.130.217.0/24 ip4:91.220.42.0/24 ip4:146.101.78.0/24 ip4:207.82.80.0/24 ip4:213.167.81.0/25 ip4:193.7.207.0/25 ip4:213.167.75.0/25 ip4:185.58.85.0/24 ip4:185.58.86.0/24 ip4:193.7.206.0/25 ip4:147.28.36.0/24 ~all",
        "chars_num": 225,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "195.130.217.0/24",
            "91.220.42.0/24",
            "146.101.78.0/24",
            "207.82.80.0/24",
            "213.167.81.0/25",
            "193.7.207.0/25",
            "213.167.75.0/25",
            "185.58.85.0/24",
            "185.58.86.0/24",
            "193.7.206.0/25",
            "147.28.36.0/24"
          ]
        }
      },
      {
        "origin": "us._netblocks.mimecast.com",
        "record": "v=spf1 ip4:207.211.31.0/25 ip4:205.139.110.0/24 ip4:216.205.24.0/24 ip4:170.10.129.0/24 ip4:63.128.21.0/24 ip4:170.10.133.0/24 ip4:185.58.84.93/32 ip4:207.211.41.113/32 ip4:207.211.30.64/26 ip4:207.211.30.128/25 ip4:216.145.221.0/24 ip4:170.10.128.0/24 ip4:170.10.132.56/29 ip4:170.10.132.64/29 ~all",
        "chars_num": 299,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "207.211.31.0/25",
            "205.139.110.0/24",
            "216.205.24.0/24",
            "170.10.129.0/24",
            "63.128.21.0/24",
            "170.10.133.0/24",
            "185.58.84.93/32",
            "207.211.41.113/32",
            "207.211.30.64/26",
            "207.211.30.128/25",
            "216.145.221.0/24",
            "170.10.128.0/24",
            "170.10.132.56/29",
            "170.10.132.64/29"
          ]
        }
      },
      {
        "origin": "za._netblocks.mimecast.com",
        "record": "v=spf1 ip4:41.74.192.0/22 ip4:41.74.200.0/23 ip4:41.74.196.0/22 ip4:41.74.204.0/23 ip4:41.74.206.0/24 ~all",
        "chars_num": 106,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "41.74.192.0/22",
            "41.74.200.0/23",
            "41.74.196.0/22",
            "41.74.204.0/23",
            "41.74.206.0/24"
          ]
        }
      },
      {
        "origin": "de._netblocks.mimecast.com",
        "record": "v=spf1 ip4:51.163.158.0/24 ip4:194.104.109.0/24 ip4:194.104.111.0/24 ip4:194.104.110.21/32 ip4:194.104.110.240/28 ip4:62.140.10.21/32 ip4:62.140.7.0/24 ip4:194.104.108.240/29 ip4:194.104.108.21/32 ip4:51.163.159.0/24 ~all",
        "chars_num": 221,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "51.163.158.0/24",
            "194.104.109.0/24",
            "194.104.111.0/24",
            "194.104.110.21/32",
            "194.104.110.240/28",
            "62.140.10.21/32",
            "62.140.7.0/24",
            "194.104.108.240/29",
            "194.104.108.21/32",
            "51.163.159.0/24"
          ]
        }
      },
      {
        "origin": "au._netblocks.mimecast.com",
        "record": "v=spf1 ip4:103.13.69.0/24 ip4:124.47.150.0/24 ip4:124.47.189.0/24 ip4:103.96.23.0/24 ip4:103.96.21.0/24 ip4:180.189.28.0/24 ip4:216.145.217.0/24 ip4:103.96.22.96/28 ip4:103.96.22.22/32 ip4:103.96.20.22/32 ip4:103.96.20.96/28 ~all",
        "chars_num": 229,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "103.13.69.0/24",
            "124.47.150.0/24",
            "124.47.189.0/24",
            "103.96.23.0/24",
            "103.96.21.0/24",
            "180.189.28.0/24",
            "216.145.217.0/24",
            "103.96.22.96/28",
            "103.96.22.22/32",
            "103.96.20.22/32",
            "103.96.20.96/28"
          ]
        }
      },
      {
        "origin": "ca._netblocks.mimecast.com",
        "record": "v=spf1 ip4:170.10.145.0/24 ip4:170.10.147.0/24 ip4:170.10.144.126/32 ip4:170.10.146.126/32 ip4:170.10.144.240/29 ip4:170.10.146.240/29 ip4:216.145.216.0/24 ~all",
        "chars_num": 160,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "170.10.145.0/24",
            "170.10.147.0/24",
            "170.10.144.126/32",
            "170.10.146.126/32",
            "170.10.144.240/29",
            "170.10.146.240/29",
            "216.145.216.0/24"
          ]
        }
      },
      {
        "origin": "usb._netblocks.mimecast.com",
        "record": "v=spf1 ip4:170.10.151.0/24 ip4:170.10.153.0/24 ip4:170.10.150.240/29 ip4:170.10.152.240/29 ip4:170.10.156.0/24 ip4:170.10.157.0/24 ~all",
        "chars_num": 135,
        "use_macro": false,
        "authorized_ips": {
          "ipv4": [
            "170.10.151.0/24",
            "170.10.153.0/24",
            "170.10.150.240/29",
            "170.10.152.240/29",
            "170.10.156.0/24",
            "170.10.157.0/24"
          ]
        }
      }
    ],
    "domains_extracted": [
      "myspace.com",
      "_netblocks.mimecast.com",
      "eu._netblocks.mimecast.com",
      "us._netblocks.mimecast.com",
      "za._netblocks.mimecast.com",
      "de._netblocks.mimecast.com",
      "au._netblocks.mimecast.com",
      "ca._netblocks.mimecast.com",
      "usb._netblocks.mimecast.com"
    ],
    "authorized_ips": {
      "ipv4": [
        "63.208.226.34",
        "204.16.32.0/22",
        "67.134.143.0/24",
        "216.205.243.0/24",
        "34.85.156.5/32",
        "35.245.108.108/32",
        "34.86.129.193/32",
        "34.86.134.94/32",
        "34.85.222.234/32",
        "34.86.176.234/32",
        "34.86.125.212/32",
        "34.85.224.60/32",
        "34.86.160.49/32",
        "35.245.64.166/32",
        "35.188.226.11/32",
        "34.86.208.228/32",
        "34.85.216.144/32",
        "35.221.22.153/32",
        "34.86.137.108/32",
        "34.86.51.35/32",
        "34.150.221.40/32",
        "34.85.216.70/32",
        "34.86.37.191/32",
        "34.85.214.215/32",
        "35.236.234.82/32",
        "34.86.161.241/32",
        "216.32.181.16",
        "216.178.32.0/20",
        "168.235.224.0/24",
        "195.130.217.0/24",
        "91.220.42.0/24",
        "146.101.78.0/24",
        "207.82.80.0/24",
        "213.167.81.0/25",
        "193.7.207.0/25",
        "213.167.75.0/25",
        "185.58.85.0/24",
        "185.58.86.0/24",
        "193.7.206.0/25",
        "147.28.36.0/24",
        "207.211.31.0/25",
        "205.139.110.0/24",
        "216.205.24.0/24",
        "170.10.129.0/24",
        "63.128.21.0/24",
        "170.10.133.0/24",
        "185.58.84.93/32",
        "207.211.41.113/32",
        "207.211.30.64/26",
        "207.211.30.128/25",
        "216.145.221.0/24",
        "170.10.128.0/24",
        "170.10.132.56/29",
        "170.10.132.64/29",
        "41.74.192.0/22",
        "41.74.200.0/23",
        "41.74.196.0/22",
        "41.74.204.0/23",
        "41.74.206.0/24",
        "51.163.158.0/24",
        "194.104.109.0/24",
        "194.104.111.0/24",
        "194.104.110.21/32",
        "194.104.110.240/28",
        "62.140.10.21/32",
        "62.140.7.0/24",
        "194.104.108.240/29",
        "194.104.108.21/32",
        "51.163.159.0/24",
        "103.13.69.0/24",
        "124.47.150.0/24",
        "124.47.189.0/24",
        "103.96.23.0/24",
        "103.96.21.0/24",
        "180.189.28.0/24",
        "216.145.217.0/24",
        "103.96.22.96/28",
        "103.96.22.22/32",
        "103.96.20.22/32",
        "103.96.20.96/28",
        "170.10.145.0/24",
        "170.10.147.0/24",
        "170.10.144.126/32",
        "170.10.146.126/32",
        "170.10.144.240/29",
        "170.10.146.240/29",
        "216.145.216.0/24",
        "170.10.151.0/24",
        "170.10.153.0/24",
        "170.10.150.240/29",
        "170.10.152.240/29",
        "170.10.156.0/24",
        "170.10.157.0/24"
      ],
      "ipv6": []
    },
    "issues_found": [],
    "spf_valid": true,
    "has_issues": false,
    "macros_found": false,
    "ip_pass": false,
    "elapsed_ms": 431
  }
}

XML Response

200 OK

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <host>myspace.com</host>
    <has_spf_record>true</has_spf_record>
    <dns_lookups_num>9</dns_lookups_num>
    <spf_record>v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all</spf_record>
    <spf_records_list>
      <item>
        <origin>myspace.com</origin>
        <record>v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all</record>
        <chars_num>637</chars_num>
        <use_macro>false</use_macro>
        <domains>
          <domain>_netblocks.mimecast.com</domain>
        </domains>
        <authorized_ips>
          <ipv4>
            <item>63.208.226.34</item>
            <item>204.16.32.0/22</item>
            <item>67.134.143.0/24</item>
            <item>216.205.243.0/24</item>
            <item>34.85.156.5/32</item>
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</response>

YAML Response

200 OK

status: ok
error: null
data:
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          - 194.104.111.0/24
          - 194.104.110.21/32
          - 194.104.110.240/28
          - 62.140.10.21/32
          - 62.140.7.0/24
          - 194.104.108.240/29
          - 194.104.108.21/32
          - 51.163.159.0/24
    - origin: au._netblocks.mimecast.com
      record: >-
        v=spf1 ip4:103.13.69.0/24 ip4:124.47.150.0/24 ip4:124.47.189.0/24
        ip4:103.96.23.0/24 ip4:103.96.21.0/24 ip4:180.189.28.0/24
        ip4:216.145.217.0/24 ip4:103.96.22.96/28 ip4:103.96.22.22/32
        ip4:103.96.20.22/32 ip4:103.96.20.96/28 ~all
      chars_num: 229
      use_macro: false
      authorized_ips:
        ipv4:
          - 103.13.69.0/24
          - 124.47.150.0/24
          - 124.47.189.0/24
          - 103.96.23.0/24
          - 103.96.21.0/24
          - 180.189.28.0/24
          - 216.145.217.0/24
          - 103.96.22.96/28
          - 103.96.22.22/32
          - 103.96.20.22/32
          - 103.96.20.96/28
    - origin: ca._netblocks.mimecast.com
      record: >-
        v=spf1 ip4:170.10.145.0/24 ip4:170.10.147.0/24 ip4:170.10.144.126/32
        ip4:170.10.146.126/32 ip4:170.10.144.240/29 ip4:170.10.146.240/29
        ip4:216.145.216.0/24 ~all
      chars_num: 160
      use_macro: false
      authorized_ips:
        ipv4:
          - 170.10.145.0/24
          - 170.10.147.0/24
          - 170.10.144.126/32
          - 170.10.146.126/32
          - 170.10.144.240/29
          - 170.10.146.240/29
          - 216.145.216.0/24
    - origin: usb._netblocks.mimecast.com
      record: >-
        v=spf1 ip4:170.10.151.0/24 ip4:170.10.153.0/24 ip4:170.10.150.240/29
        ip4:170.10.152.240/29 ip4:170.10.156.0/24 ip4:170.10.157.0/24 ~all
      chars_num: 135
      use_macro: false
      authorized_ips:
        ipv4:
          - 170.10.151.0/24
          - 170.10.153.0/24
          - 170.10.150.240/29
          - 170.10.152.240/29
          - 170.10.156.0/24
          - 170.10.157.0/24
  domains_extracted:
    - myspace.com
    - _netblocks.mimecast.com
    - eu._netblocks.mimecast.com
    - us._netblocks.mimecast.com
    - za._netblocks.mimecast.com
    - de._netblocks.mimecast.com
    - au._netblocks.mimecast.com
    - ca._netblocks.mimecast.com
    - usb._netblocks.mimecast.com
  authorized_ips:
    ipv4:
      - 63.208.226.34
      - 204.16.32.0/22
      - 67.134.143.0/24
      - 216.205.243.0/24
      - 34.85.156.5/32
      - 35.245.108.108/32
      - 34.86.129.193/32
      - 34.86.134.94/32
      - 34.85.222.234/32
      - 34.86.176.234/32
      - 34.86.125.212/32
      - 34.85.224.60/32
      - 34.86.160.49/32
      - 35.245.64.166/32
      - 35.188.226.11/32
      - 34.86.208.228/32
      - 34.85.216.144/32
      - 35.221.22.153/32
      - 34.86.137.108/32
      - 34.86.51.35/32
      - 34.150.221.40/32
      - 34.85.216.70/32
      - 34.86.37.191/32
      - 34.85.214.215/32
      - 35.236.234.82/32
      - 34.86.161.241/32
      - 216.32.181.16
      - 216.178.32.0/20
      - 168.235.224.0/24
      - 195.130.217.0/24
      - 91.220.42.0/24
      - 146.101.78.0/24
      - 207.82.80.0/24
      - 213.167.81.0/25
      - 193.7.207.0/25
      - 213.167.75.0/25
      - 185.58.85.0/24
      - 185.58.86.0/24
      - 193.7.206.0/25
      - 147.28.36.0/24
      - 207.211.31.0/25
      - 205.139.110.0/24
      - 216.205.24.0/24
      - 170.10.129.0/24
      - 63.128.21.0/24
      - 170.10.133.0/24
      - 185.58.84.93/32
      - 207.211.41.113/32
      - 207.211.30.64/26
      - 207.211.30.128/25
      - 216.145.221.0/24
      - 170.10.128.0/24
      - 170.10.132.56/29
      - 170.10.132.64/29
      - 41.74.192.0/22
      - 41.74.200.0/23
      - 41.74.196.0/22
      - 41.74.204.0/23
      - 41.74.206.0/24
      - 51.163.158.0/24
      - 194.104.109.0/24
      - 194.104.111.0/24
      - 194.104.110.21/32
      - 194.104.110.240/28
      - 62.140.10.21/32
      - 62.140.7.0/24
      - 194.104.108.240/29
      - 194.104.108.21/32
      - 51.163.159.0/24
      - 103.13.69.0/24
      - 124.47.150.0/24
      - 124.47.189.0/24
      - 103.96.23.0/24
      - 103.96.21.0/24
      - 180.189.28.0/24
      - 216.145.217.0/24
      - 103.96.22.96/28
      - 103.96.22.22/32
      - 103.96.20.22/32
      - 103.96.20.96/28
      - 170.10.145.0/24
      - 170.10.147.0/24
      - 170.10.144.126/32
      - 170.10.146.126/32
      - 170.10.144.240/29
      - 170.10.146.240/29
      - 216.145.216.0/24
      - 170.10.151.0/24
      - 170.10.153.0/24
      - 170.10.150.240/29
      - 170.10.152.240/29
      - 170.10.156.0/24
      - 170.10.157.0/24
    ipv6: []
  issues_found: []
  spf_valid: true
  has_issues: false
  macros_found: false
  ip_pass: false
  elapsed_ms: 431

CSV Response

200 OK

key	value
host	myspace.com
has_spf_record	true
dns_lookups_num	9
spf_record	v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all
spf_records_list	[{origin:myspace.com,record:v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all,chars_num:637,use_macro:false,domains:[_netblocks.mimecast.com],authorized_ips:{ipv4:[63.208.226.34,204.16.32.0/22,67.134.143.0/24,216.205.243.0/24,34.85.156.5/32,35.245.108.108/32,34.86.129.193/32,34.86.134.94/32,34.85.222.234/32,34.86.176.234/32,34.86.125.212/32,34.85.224.60/32,34.86.160.49/32,35.245.64.166/32,35.188.226.11/32,34.86.208.228/32,34.85.216.144/32,35.221.22.153/32,34.86.137.108/32,34.86.51.35/32,34.150.221.40/32,34.85.216.70/32,34.86.37.191/32,34.85.214.215/32,35.236.234.82/32,34.86.161.241/32,216.32.181.16,216.178.32.0/20,168.235.224.0/24]}},{origin:_netblocks.mimecast.com,record:v=spf1 include:eu._netblocks.mimecast.com include:us._netblocks.mimecast.com include:za._netblocks.mimecast.com include:de._netblocks.mimecast.com include:au._netblocks.mimecast.com include:ca._netblocks.mimecast.com include:usb._netblocks.mimecast.com ~all,chars_num:257,use_macro:false,domains:[eu._netblocks.mimecast.com,us._netblocks.mimecast.com,za._netblocks.mimecast.com,de._netblocks.mimecast.com,au._netblocks.mimecast.com,ca._netblocks.mimecast.com,usb._netblocks.mimecast.com]},{origin:eu._netblocks.mimecast.com,record:v=spf1 ip4:195.130.217.0/24 ip4:91.220.42.0/24 ip4:146.101.78.0/24 ip4:207.82.80.0/24 ip4:213.167.81.0/25 ip4:193.7.207.0/25 ip4:213.167.75.0/25 ip4:185.58.85.0/24 ip4:185.58.86.0/24 ip4:193.7.206.0/25 ip4:147.28.36.0/24 ~all,chars_num:225,use_macro:false,authorized_ips:{ipv4:[195.130.217.0/24,91.220.42.0/24,146.101.78.0/24,207.82.80.0/24,213.167.81.0/25,193.7.207.0/25,213.167.75.0/25,185.58.85.0/24,185.58.86.0/24,193.7.206.0/25,147.28.36.0/24]}},{origin:us._netblocks.mimecast.com,record:v=spf1 ip4:207.211.31.0/25 ip4:205.139.110.0/24 ip4:216.205.24.0/24 ip4:170.10.129.0/24 ip4:63.128.21.0/24 ip4:170.10.133.0/24 ip4:185.58.84.93/32 ip4:207.211.41.113/32 ip4:207.211.30.64/26 ip4:207.211.30.128/25 ip4:216.145.221.0/24 ip4:170.10.128.0/24 ip4:170.10.132.56/29 ip4:170.10.132.64/29 ~all,chars_num:299,use_macro:false,authorized_ips:{ipv4:[207.211.31.0/25,205.139.110.0/24,216.205.24.0/24,170.10.129.0/24,63.128.21.0/24,170.10.133.0/24,185.58.84.93/32,207.211.41.113/32,207.211.30.64/26,207.211.30.128/25,216.145.221.0/24,170.10.128.0/24,170.10.132.56/29,170.10.132.64/29]}},{origin:za._netblocks.mimecast.com,record:v=spf1 ip4:41.74.192.0/22 ip4:41.74.200.0/23 ip4:41.74.196.0/22 ip4:41.74.204.0/23 ip4:41.74.206.0/24 ~all,chars_num:106,use_macro:false,authorized_ips:{ipv4:[41.74.192.0/22,41.74.200.0/23,41.74.196.0/22,41.74.204.0/23,41.74.206.0/24]}},{origin:de._netblocks.mimecast.com,record:v=spf1 ip4:51.163.158.0/24 ip4:194.104.109.0/24 ip4:194.104.111.0/24 ip4:194.104.110.21/32 ip4:194.104.110.240/28 ip4:62.140.10.21/32 ip4:62.140.7.0/24 ip4:194.104.108.240/29 ip4:194.104.108.21/32 ip4:51.163.159.0/24 ~all,chars_num:221,use_macro:false,authorized_ips:{ipv4:[51.163.158.0/24,194.104.109.0/24,194.104.111.0/24,194.104.110.21/32,194.104.110.240/28,62.140.10.21/32,62.140.7.0/24,194.104.108.240/29,194.104.108.21/32,51.163.159.0/24]}},{origin:au._netblocks.mimecast.com,record:v=spf1 ip4:103.13.69.0/24 ip4:124.47.150.0/24 ip4:124.47.189.0/24 ip4:103.96.23.0/24 ip4:103.96.21.0/24 ip4:180.189.28.0/24 ip4:216.145.217.0/24 ip4:103.96.22.96/28 ip4:103.96.22.22/32 ip4:103.96.20.22/32 ip4:103.96.20.96/28 ~all,chars_num:229,use_macro:false,authorized_ips:{ipv4:[103.13.69.0/24,124.47.150.0/24,124.47.189.0/24,103.96.23.0/24,103.96.21.0/24,180.189.28.0/24,216.145.217.0/24,103.96.22.96/28,103.96.22.22/32,103.96.20.22/32,103.96.20.96/28]}},{origin:ca._netblocks.mimecast.com,record:v=spf1 ip4:170.10.145.0/24 ip4:170.10.147.0/24 ip4:170.10.144.126/32 ip4:170.10.146.126/32 ip4:170.10.144.240/29 ip4:170.10.146.240/29 ip4:216.145.216.0/24 ~all,chars_num:160,use_macro:false,authorized_ips:{ipv4:[170.10.145.0/24,170.10.147.0/24,170.10.144.126/32,170.10.146.126/32,170.10.144.240/29,170.10.146.240/29,216.145.216.0/24]}},{origin:usb._netblocks.mimecast.com,record:v=spf1 ip4:170.10.151.0/24 ip4:170.10.153.0/24 ip4:170.10.150.240/29 ip4:170.10.152.240/29 ip4:170.10.156.0/24 ip4:170.10.157.0/24 ~all,chars_num:135,use_macro:false,authorized_ips:{ipv4:[170.10.151.0/24,170.10.153.0/24,170.10.150.240/29,170.10.152.240/29,170.10.156.0/24,170.10.157.0/24]}}]
domains_extracted	[myspace.com,_netblocks.mimecast.com,eu._netblocks.mimecast.com,us._netblocks.mimecast.com,za._netblocks.mimecast.com,de._netblocks.mimecast.com,au._netblocks.mimecast.com,ca._netblocks.mimecast.com,usb._netblocks.mimecast.com]
authorized_ips	{ipv4:[63.208.226.34,204.16.32.0/22,67.134.143.0/24,216.205.243.0/24,34.85.156.5/32,35.245.108.108/32,34.86.129.193/32,34.86.134.94/32,34.85.222.234/32,34.86.176.234/32,34.86.125.212/32,34.85.224.60/32,34.86.160.49/32,35.245.64.166/32,35.188.226.11/32,34.86.208.228/32,34.85.216.144/32,35.221.22.153/32,34.86.137.108/32,34.86.51.35/32,34.150.221.40/32,34.85.216.70/32,34.86.37.191/32,34.85.214.215/32,35.236.234.82/32,34.86.161.241/32,216.32.181.16,216.178.32.0/20,168.235.224.0/24,195.130.217.0/24,91.220.42.0/24,146.101.78.0/24,207.82.80.0/24,213.167.81.0/25,193.7.207.0/25,213.167.75.0/25,185.58.85.0/24,185.58.86.0/24,193.7.206.0/25,147.28.36.0/24,207.211.31.0/25,205.139.110.0/24,216.205.24.0/24,170.10.129.0/24,63.128.21.0/24,170.10.133.0/24,185.58.84.93/32,207.211.41.113/32,207.211.30.64/26,207.211.30.128/25,216.145.221.0/24,170.10.128.0/24,170.10.132.56/29,170.10.132.64/29,41.74.192.0/22,41.74.200.0/23,41.74.196.0/22,41.74.204.0/23,41.74.206.0/24,51.163.158.0/24,194.104.109.0/24,194.104.111.0/24,194.104.110.21/32,194.104.110.240/28,62.140.10.21/32,62.140.7.0/24,194.104.108.240/29,194.104.108.21/32,51.163.159.0/24,103.13.69.0/24,124.47.150.0/24,124.47.189.0/24,103.96.23.0/24,103.96.21.0/24,180.189.28.0/24,216.145.217.0/24,103.96.22.96/28,103.96.22.22/32,103.96.20.22/32,103.96.20.96/28,170.10.145.0/24,170.10.147.0/24,170.10.144.126/32,170.10.146.126/32,170.10.144.240/29,170.10.146.240/29,216.145.216.0/24,170.10.151.0/24,170.10.153.0/24,170.10.150.240/29,170.10.152.240/29,170.10.156.0/24,170.10.157.0/24],ipv6:[]}
issues_found	[]
spf_valid	true
has_issues	false
macros_found	false
ip_pass	false
elapsed_ms	431

Live Test SPF Validator API

Response Structure

All API responses follow a consistent structure with the following fields:

Field	Type	Description	Example
`status`	string	Indicates whether the request was successful ("ok") or failed ("error")	`ok`
`error`	string \| null	Contains error message if status is "error", otherwise null	`null`
`data`	object \| null	Contains the API response data if successful, otherwise null	`{...}`

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Field	Type	Sample Value
`host`	string	`"myspace.com"`
`has_spf_record`	boolean	`true`
`dns_lookups_num`	number	`9`
`spf_record`	string	"v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all"
[ ] Array items:	array[9]	`Array of objects`
└ `origin`	string	`"myspace.com"`
└ `record`	string	"v=spf1 mx ip4:63.208.226.34 ip4:204.16.32.0/22 ip4:67.134.143.0/24 ip4:216.205.243.0/24 ip4:34.85.156.5/32 ip4:35.245.108.108/32 ip4:34.86.129.193/32 ip4:34.86.134.94/32 ip4:34.85.222.234/32 ip4:34.86.176.234/32 ip4:34.86.125.212/32 ip4:34.85.224.60/32 ip4:34.86.160.49/32 ip4:35.245.64.166/32 ip4:35.188.226.11/32 ip4:34.86.208.228/32 ip4:34.85.216.144/32 ip4:35.221.22.153/32 ip4:34.86.137.108/32 ip4:34.86.51.35/32 ip4:34.150.221.40/32 ip4:34.85.216.70/32 ip4:34.86.37.191/32 ip4:34.85.214.215/32 ip4:35.236.234.82/32 ip4:34.86.161.241/32 ip4:216.32.181.16 ip4:216.178.32.0/20 ip4:168.235.224.0/24 include:_netblocks.mimecast.com -all"
└ `chars_num`	number	`637`
└ `use_macro`	boolean	`false`
└ `domains`	array	`["_netblocks.mimecast.com"]`
└ `authorized_ips`	object	`{...}`
└ `ipv4`	array	`["63.208.226.34", ...]`
`domains_extracted`	array	`["myspace.com", ...]`
`authorized_ips`	object	`{...}`
└ `ipv4`	array	`["63.208.226.34", ...]`
└ `ipv6`	array	`[]`
`issues_found`	array	`[]`
`spf_valid`	boolean	`true`
`has_issues`	boolean	`false`
`macros_found`	boolean	`false`

Headers

Required and optional headers for SPF Validator API requests:

Header Name	Required	Example Value	Description
`X-API-Key`	`required`	`your_api_key_here`	Your APIVerve API key. Found in your dashboard under API Keys.
`Accept`	`optional`	`application/json`	Specify response format: application/json (default), application/xml, or application/yaml
`User-Agent`	`optional`	`MyApp/1.0`	Identifies your application for analytics and debugging purposes
`X-Request-ID`	`optional`	`req_123456789`	Custom request identifier for tracking and debugging requests
`Cache-Control`	`optional`	`no-cache`	Control caching behavior for the request and response

Learn more about request headers →

GraphQL AccessALPHA

Access SPF Validator through GraphQL to combine it with other API calls in a single request. Query only the spf validator data you need with precise field selection, and orchestrate complex data fetching workflows.

Test SPF Validator in the GraphQL Explorer to confirm availability and experiment with queries.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

GraphQL Endpoint

POST https://api.apiverve.com/v1/graphql

GraphQL Query Example

query {
  spfvalidator(
    input: {
      domain: "myspace.com"
    }
  ) {
    host
    has_spf_record
    dns_lookups_num
    spf_record
    spf_records_list
    domains_extracted
    authorized_ips {
      ipv4
      ipv6
    }
    issues_found
    spf_valid
    has_issues
    macros_found
    ip_pass
    elapsed_ms
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

Try in GraphQL Explorer GraphQL Documentation

CORS Support

The SPF Validator API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call SPF Validator directly from browser-based applications without proxy servers.

CORS Header	Value	Description
`Access-Control-Allow-Origin`	`*`	Accepts requests from any origin
`Access-Control-Allow-Methods`	`*`	Accepts any HTTP method
`Access-Control-Allow-Headers`	`*`	Accepts any request headers

Browser Usage: You can call SPF Validator directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.

Learn more about CORS support →

Rate Limiting

SPF Validator API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all SPF Validator users.

Plan	Rate Limit	Description
Free	5 requests/min	Hard rate limit enforced - exceeding will return 429 errors
Starter	No Limit	Production ready - standard traffic priority
Pro	No Limit	Production ready - preferred traffic priority
Mega	No Limit	Production ready - highest traffic priority

Learn more about rate limiting →

Rate Limit Headers

When rate limits apply, each SPF Validator response includes headers to help you track your usage:

Header	Description
`X-RateLimit-Limit`	Maximum number of requests allowed per time window
`X-RateLimit-Remaining`	Number of requests remaining in the current window
`X-RateLimit-Reset`	Unix timestamp when the rate limit window resets

Handling Rate Limits

Free Plan: When you exceed your rate limit, SPF Validator returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.

Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.

Best Practices for SPF Validator:

Monitor the rate limit headers to track your SPF Validator usage (Free plan only)
Cache spf validator responses where appropriate to reduce API calls
Upgrade to Pro or Mega for guaranteed no-throttle SPF Validator performance

Note: SPF Validator rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using SPF Validator on Free tier.

Error Codes

The SPF Validator API uses standard HTTP status codes to indicate success or failure:

Code	Message	Description	Solution
`200`	`OK`	Request successful, data returned	No action needed - request was successful
`400`	`Bad Request`	Invalid request parameters or malformed request	Check required parameters and ensure values match expected formats
`401`	`Unauthorized`	Missing or invalid API key	Include x-api-key header with valid API key from dashboard
`403`	`Forbidden`	API key lacks permission or insufficient credits	Check credit balance in dashboard or upgrade plan
`429`	`Too Many Requests`	Rate limit exceeded (Free: 5 req/min)	Implement request throttling or upgrade to paid plan
`500`	`Internal Server Error`	Server error occurred	Retry request after a few seconds, contact support if persists
`503`	`Service Unavailable`	API temporarily unavailable	Wait and retry, check status page for maintenance updates

Learn more about error handling →

Need help? Contact support with your X-Request-ID for assistance.

Integrate SPF Validator with SDKs

Get started quickly with official SPF Validator SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.

Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.

JitPack

Integrate SPF Validator with No-Code API Tools

Connect the SPF Validator API to your favorite automation platform without writing code. Build workflows that leverage spf validator data across thousands of apps.

ZapierConnect SPF Validator to 6,000+ apps

MakeBuild visual spf validator workflows

PipedreamCode-friendly spf validator automation

n8nSelf-host your spf validator workflows

Power AutomateUse SPF Validator in Microsoft 365

All platforms use your same API key to access SPF Validator. Visit our integrations hub for step-by-step setup guides.

Frequently Asked Questions

How do I get an API key for SPF Validator?

Sign up for a free account at dashboard.apiverve.com. Your API key will be automatically generated and available in your dashboard. The same key works for SPF Validator and all other APIVerve APIs. The free plan includes 1,000 credits plus a 500 credit bonus.

How many credits does SPF Validator cost?

Each successful SPF Validator API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful spf validator lookups.

Can I use SPF Validator in production?

The free plan is for testing and development only. For production use of SPF Validator, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.

Can I use SPF Validator from a browser?

Yes! The SPF Validator API supports CORS with wildcard configuration, so you can call it directly from browser-based JavaScript without needing a proxy server. See the CORS section above for details.

What happens if I exceed my SPF Validator credit limit?

When you reach your monthly credit limit, SPF Validator API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.

What's Next?

Continue your journey with these recommended resources

Browse All APIs

Explore our complete catalog of APIs

Authentication Guide

Learn about API keys and security

Rate Limits

Understand usage limits and best practices

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SPF Validator API

GET Endpoint

Code Examples

Authentication

Interactive API Playground

Parameters

Option 1: Validate SPF Record & Test IP Authorization

Option 2: Test IP Authorization

Response

Example Responses

Response Structure

Response Data Fields

Headers

GraphQL AccessALPHA

CORS Support

Rate Limiting

Rate Limit Headers

Handling Rate Limits

Error Codes

Integrate SPF Validator with SDKs

Integrate SPF Validator with No-Code API Tools

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