2021-03-08 21:50:14 +08:00
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---
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layout: default
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2021-03-29 22:09:10 +08:00
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title: DMARC Builder
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2021-03-08 21:50:14 +08:00
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---
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# DMARC Builder
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dnscontrol contains a DMARC_BUILDER which can be used to simply create
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DMARC policies for your domains.
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## Example
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### Simple example
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```js
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DMARC_BUILDER({
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policy: 'reject',
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ruf: [
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'mailto:mailauth-reports@example.com',
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],
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})
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```
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This yield the following record:
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```
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@ IN TXT "v=DMARC1; p=reject; ruf=mailto:mailauth-reports@example.com"
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```
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### Advanced example
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```js
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DMARC_BUILDER({
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policy: 'reject',
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subdomainPolicy: 'quarantine',
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percent: 50,
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alignmentSPF: 'r',
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alignmentDKIM: 'strict',
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rua: [
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'mailto:mailauth-reports@example.com',
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'https://dmarc.example.com/submit',
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],
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ruf: [
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'mailto:mailauth-reports@example.com',
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],
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failureOptions: '1',
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reportInterval: '1h',
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}),
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DMARC_BUILDER({
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label: 'insecure',
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policy: 'none',
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ruf: [
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'mailto:mailauth-reports@example.com',
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],
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failureOptions: {
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SPF: false,
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DKIM: true,
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},
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})
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```
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This yields the following records:
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```
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@ IN TXT "v=DMARC1; p=reject; sp=quarantine; adkim=s; aspf=r; pct=50; rua=mailto:mailauth-reports@example.com,https://dmarc.example.com/submit; ruf=mailto:mailauth-reports@example.com; fo=1; ri=3600"
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insecure IN TXT "v=DMARC1; p=none; ruf=mailto:mailauth-reports@example.com; fo=d"
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```
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### Parameters
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* `label:` The DNS label for the DMARC record (`_dmarc` prefix is added, default: `'@'`)
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* `policy:` The DMARC policy (`p=`), must be one of `'none'`, `'quarantine'`, `'reject'`
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* `subdomainPolicy:` The DMARC policy for subdomains (`sp=`), must be one of `'none'`, `'quarantine'`, `'reject'` (optional)
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* `alignmentSPF:` `'strict'`/`'s'` or `'relaxed'`/`'r'` alignment for SPF (`aspf=`, default: `'r'`)
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* `alignmentDKIM:` `'strict'`/`'s'` or `'relaxed'`/`'r'` alignment for DKIM (`adkim=`, default: `'r'`)
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* `percent:` Number between `0` and `100`, percentage for which policies are applied (`pct=`, default: `100`)
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* `rua:` Array of aggregate report targets (optional)
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* `ruf:` Array of failure report targets (optional)
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* `failureOptions:` Object or string; Object containing booleans `SPF` and `DKIM`, string is passed raw (`fo=`, default: `'0'`)
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* `failureFormat:` Format in which failure reports are requested (`rf=`, default: `'afrf'`)
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* `reportInterval:` Interval in which reports are requested (`ri=`)
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* `ttl:` Input for `TTL` method (optional)
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### Caveats
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* TXT records are automatically split using `AUTOSPLIT`.
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* URIs in the `rua` and `ruf` arrays are passed raw. You must percent-encode all commas and exclamation points in the URI itself.
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