Check the address, reverse name and forward address triple that receivers actual
Check the address, reverse name and forward address triple that receivers actually evaluate. Reports an address with no reverse name, which many receivers refuse before the message body is sent; a reverse name that resolves to a different address, so forward confirmation fails, which is worse than having none because it looks configured; a provider-generated name; and a HELO that does not match the reverse name.
Not answeringour last check, 2026-10-04
0 of 1checks answered this week
n/amedian answer time
$0.14listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/reverse-dns-consistency-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | no answer |
Example input (from the provider)
{
"body": {
"expected_domain": "example.test",
"hosts": [
{
"address": "203.0.113.10",
"forward_addresses": [
"203.0.113.10"
],
"helo": "mx1.example.test",
"ptr": "mx1.example.test"
},
{
"address": "203.0.113.11",
"forward_addresses": [
"203.0.113.99"
],
"helo": "mx2.example.test",
"ptr": "mx2.example.test"
},
{
"address": "198.51.100.7",
"forward_addresses": [
"198.51.100.7"
],
"helo": "mail.example.test",
"ptr": "198-51-100-7.static.hosting-vendor.test"
},
{
"address": "192.0.2.44"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"expected_domain": {
"maxLength": 253,
"type": "string"
},
"hosts": {
"items": {
"additionalProperties": false,
"properties": {
"address": {
"maxLength": 64,
"type": "string"
},
"forward_addresses": {
"items": {
"maxLength": 64,
"type": "string"
},
"maxItems": 50,
"minItems": 1,
"type": "array"
},
"helo": {
"maxLength": 253,
"type": "string"
},
"ptr": {
"maxLength": 253,
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"maxItems": 500,
"minItems": 1,
"type": "array"
}
},
"required": [
"hosts"
],
"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"
}