Read an SPF record, a DMARC record and a set of DKIM selectors together, and rep
Read an SPF record, a DMARC record and a set of DKIM selectors together, and report the combinations that defeat themselves. Every finding needs two or three records at once, which is why a single-record checker finds none of them: a reject policy with no usable selector, an enforcing policy over an SPF record ending in +all, strict alignment with subdomain senders, enforcement with no reporting address, and a subdomain policy that no sending path can satisfy.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/mail-authentication-coherence-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"dkim_selectors": [
{
"record": "v=DKIM1; k=rsa; t=y; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1234QIDAQAB",
"selector": "rollout2026"
},
{
"record": "v=DKIM1; k=rsa; p=",
"selector": "retired2024"
}
],
"dmarc": "v=DMARC1; p=reject; aspf=s; adkim=s",
"domain": "example.test",
"sending_subdomains": [
"mail.example.test",
"notifications.example.test"
],
"spf": "v=spf1 include:_spf.vendor-a.test a mx +all"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"dkim_selectors": {
"items": {
"additionalProperties": false,
"properties": {
"record": {
"maxLength": 4096,
"type": "string"
},
"selector": {
"maxLength": 128,
"type": "string"
}
},
"required": [
"selector",
"record"
],
"type": "object"
},
"maxItems": 100,
"minItems": 1,
"type": "array"
},
"dmarc": {
"maxLength": 4096,
"type": "string"
},
"domain": {
"maxLength": 253,
"type": "string"
},
"sending_subdomains": {
"items": {
"maxLength": 253,
"type": "string"
},
"maxItems": 200,
"minItems": 1,
"type": "array"
},
"spf": {
"maxLength": 4096,
"type": "string"
}
},
"required": [
"domain"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}