How to Fix 'SPF too many DNS lookups'

Here is how to fix 'SPF too many DNS lookups', step by step.

The steps

SPF allows only 10 DNS lookups; flatten includes into resolved IPs or consolidate senders to avoid a permerror that fails SPF entirely.

Why it matters

Getting this right is part of landing in the inbox instead of spam. See the full deliverability checklist.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, plus an AI that watches your list health and deliverability — and it welcomes the senders Amazon SES, SendGrid and Mailchimp reject, from $8. Run the free 10-second checker or see plans.