SPF Record Generator

Build a valid SPF TXT record from your sending sources. Just fill in the form and copy the result to your DNS.

IP Addresses (one per line)

Include Domains (one per line, e.g. _spf.google.com)

Include domain's MX servers?

Fail Policy

Recommended for most setups. Servers not listed in your SPF record are marked as failing authentication.

Messages from unlisted servers are accepted but marked. Good for testing a new SPF record before going strict.

SPF records have a 10 DNS lookup limit. Exceeding it causes failures. Use this tool to stay within bounds.