Free SPF Record Flattener - Reduce DNS Lookups
SPF (Sender Policy Framework) records are limited to 10 DNS lookups. When you use multiple email services (Google Workspace, Mailchimp, SendGrid, etc.), you can easily exceed this limit, causing email delivery failures. Our SPF flattener resolves all include mechanisms recursively and generates a flattened record using only IP addresses, reducing your lookup count to zero.
Accepts: example.com · www.example.com · https://example.com
What This Tool Does
Comprehensive SPF flattening powered by Vysiro's DNS-over-HTTPS scanning engines
Recursive include chain resolution
IPv4 and IPv6 address extraction
DNS lookup count comparison
Visual include tree visualization
Flattened record generation
One-click copy to clipboard
Record length validation
exists: mechanism preservation
How It Works
Get a flattened SPF record in seconds
Enter your domain name in the scanner
We fetch and parse your SPF TXT record via DNS-over-HTTPS
All include, a, mx, and redirect mechanisms are resolved recursively
IP addresses are extracted and deduplicated from each resolved mechanism
A flattened record is generated using only ip4/ip6 mechanisms
You get a side-by-side comparison with the original record and a copy button
Frequently Asked Questions
Everything you need to know about SPF flattening
SPF flattening replaces DNS-lookup-causing mechanisms (include, a, mx, redirect) with the actual IP addresses they resolve to. This reduces DNS lookups at evaluation time to zero, keeping your SPF record well within the RFC 7208 10-lookup limit.
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