The SPF 10-lookup limit and how to stay under it

SPF allows at most 10 DNS lookups when evaluating a record. Each include:, a, and mx counts.

Stacking providers — include:_spf.google.com include:sendgrid.net include:mailgun.org — blows the budget and yields a permerror, which receivers treat as SPF fail.

Fix

Consolidate to the providers you actually use, and prefer a single flattened include. With BookMySpot you keep just include:spf.bookmyspot.us — we manage the IPs behind it, so you never touch DNS when they change.