Defaults.Exposed › Glossary › SPF "too many lookups" error

SPF "too many lookups" error

Also known as: SPF permerror, SPF 10 DNS lookup limit, too many DNS lookups

An SPF record is allowed only ten behind-the-scenes lookups — go over and the whole record is treated as broken, so your email loses its protection even though the record still appears to exist.

What it is

An SPF record often doesn’t list mail servers directly — instead it points to other services (your email provider, your invoicing tool, your marketing platform) and borrows their lists. Each of those references requires the receiving provider to do a behind-the-scenes lookup, and the rules cap this at ten lookups total.

Go over the limit and the receiving provider gives up and marks your SPF as a permanent error (“permerror”). The record is still sitting there in your settings, but it no longer does its job.

Why it matters to your business

This is a silent failure. The record looks present and correct at a glance, so you assume you’re protected — but in practice your SPF is being ignored. That means your domain is easier to impersonate again, and your genuine email is more likely to be junked by Gmail and Outlook.

It usually creeps up over time: you add a new tool that sends email, then another, and one day you’ve quietly tipped over ten lookups without changing anything obvious. Nobody gets an alert.

How to tell / what to do

Our free checker counts the lookups and flags this exact problem in plain English. The fix is to tidy the record — trimming unused services, consolidating, or “flattening” entries so you stay under the limit — done by whoever manages your domain. It’s free. See the SPF fix guide.

Want to fix this on your own domain? See the free guide →