Your SPF record silently fails at ten lookups

<p>SPF has a hard limit: at most ten DNS lookups that cause further lookups — the include, a, mx, ptr, exists and redirect mechanisms. Go over it and the result is permerror, which most receivers treat as a fail. Nothing warns you. The record still resolves, the mail still sends, and authentication quietly stops working.</p> <h2> Why records creep past the limit </h2> <p>Every tool you add wants i

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