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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 | |||
| (inlining) includes and removing duplicates. DNSControl also makes | ||||
| it easier to document your SPF configuration. | ||||
| 
 | ||||
| **Warning:** Flattening SPF includes is risky.  Only flatten an SPF | ||||
| {% hint style="warning" %} | ||||
| **WARNING**: Flattening SPF includes is risky.  Only flatten an SPF | ||||
| setting if it is absolutely needed to bring the number of "lookups" | ||||
| to be less than 10. In fact, it is debatable whether or not ISPs | ||||
| enforce the "10 lookup rule". | ||||
| {% endhint %} | ||||
| 
 | ||||
| 
 | ||||
| ## The old way | ||||
|  |  | |||
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