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SPF Validator API

This API lets you check and validate the SPF record of any domain name,
view a list of authorized IPv4 and IPv6 addresses published by the SPF record, view a list of "include" and "redirect" domain names extracted during the SPF records analysis, check if an IP address is authorized to send emails on behalf of the domain. This JSON API is
fast and can be easily integrated in any service.

Register and get 25 free API credits

Example JSON API Output

A Simple Way to Verify SPF

With this API you can view details information about the published SPF record
of a given domain, you can check if the SPF record has issues, such as if it is using PTR lookups
that are deprecated, if there are more than one SPF record, if there are uppercase
characters (that is bad), if the SPF record exceeds the maximum of 10 lookups ,and more.
With this API you can quickly check if a SPF record is valid. Additionally, you can also specify an IP address
and we will check if that submitted IP address is authorized to send emails.

SPF Records Details

SPF Records Details

This API recursively scans all SPF records by following redirects and includes, you can view all authorized IPv4 and IPv6 addresses, the list of extracted domain names, the number of DNS lookups performed, and much more.


Validate SPF Records

Validate SPF Records

Our API performs various checks on the SPF record(s) analyzed and shows warnings in case problems are found, for example if the SPF record is not present, if it contains uppercase characters, if it uses deprecated methods, etc.


Check SPF Authorized IP

Authorized IP Test

You can submit an IP address as an additional parameter with the HTTP GET field "&iptest=1.2.3.4" and our API will check if the submitted IP address (can be an IPv4 or IPv6) is authorized to send emails on behalf of the domain.


Simple Pricing

To consume this API service you can use your global credits. So each time you make
one API query, our system will decrease N credits. With your credits you can use all our API services!
Purchased credits need to be consumed within 1 year. Below you can find how many
credits are decreased for each API query with SPF Validator API:

0.70 Credits /Query

View Credits Pricing

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