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DOCS: SPF_BUILDER GitBook hint block (#1995)
Co-authored-by: Tom Limoncelli <tlimoncelli@stackoverflow.com>
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@ -25,10 +25,12 @@ DNSControl can optimize the SPF settings on a domain by flattening
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(inlining) includes and removing duplicates. DNSControl also makes
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it easier to document your SPF configuration.
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**Warning:** Flattening SPF includes is risky. Only flatten an SPF
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{% hint style="warning" %}
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**WARNING**: Flattening SPF includes is risky. Only flatten an SPF
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setting if it is absolutely needed to bring the number of "lookups"
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to be less than 10. In fact, it is debatable whether or not ISPs
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enforce the "10 lookup rule".
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{% endhint %}
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## The old way
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