SPF flattening blog

In-depth guides on fixing SPF lookup problems and keeping your email authenticated.

The SPF 10-lookup limit, explained — why the limit exists, what counts, and how real domains blow past it.
How to flatten an SPF record (step by step) — a practical walkthrough, plus the self-healing alternative.

Test your SPF record now

Not sure how many DNS lookups your SPF record uses? Check your domain in seconds and see exactly which senders are pushing you over the limit.

Free check · no signup required to see your lookup count.