SPF Flattening: What It Is and When You Need It

SPF flattening reduces DNS lookups by expanding includes. Learn why the 10-lookup limit matters and safer alternatives.

SPF flattening is the process of expanding SPF includes into a single record to reduce DNS lookups and avoid exceeding the 10-lookup limit.

It can improve reliability, but it also increases maintenance complexity because vendor IPs change. A safer approach is minimizing includes and consolidating senders, using flattening only when necessary.

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DKIM Selector: What It Is and How to Choose One

It just works like magic.

SPF Flattening: What It Is and When You Need It

It just works like magic.