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.
Related Keywords
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