SPF Validator API
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.
avg: 379ms|p50: 359ms|p75: 393ms|p90: 434ms|p99: 515ms
avg: 379ms|p50: 359ms|p90: 434ms|p99: 515ms
Live Test API
Try out the SPF Validator with a live request and see the response in real-time.
API Request
GET
https://api.apiverve.com
Parameters
API Response
200 OK
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318{ "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 } }
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Frequently Asked Questions
Get answers to common questions about the SPF Validator API
What does the SPF Validator API do?
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 API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.
How fast is the SPF Validator API?
The SPF Validator API has an average response time of 379ms, with a median (p50) of 359ms and 99th percentile of 515ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.
How much does the SPF Validator API cost?
Each call to the SPF Validator API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.
How do I authenticate SPF Validator API requests?
Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.
What HTTP methods does SPF Validator support?
The SPF Validator API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.
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