What this checks,and why.
In one line
An SPF checker reads your domain’s DNS TXT records and validates whether authorized senders are declared correctly.
Why it matters
SPF failures cause authentication misalignment, spam folder placement, and bounces before your campaign even starts.
How to act on it
Enter your domain, review the SPF record, lookup count, and includes — then fix DNS before sending at scale.
Read the result.
What an SPF check validates
SPF is published as a DNS TXT record starting with v=spf1. It lists IP addresses and include mechanisms that authorize sending servers.
Common SPF problems include too many DNS lookups (limit of 10), syntax errors, stale includes after a provider migration, and ~all vs -all policy mistakes.
SPF issues that cause deliverability problems
Hard fail when legitimate mail sends from an unlisted server. Soft fail or neutral policy when receivers expect strict alignment.
Nested include chains that exceed DNS lookup limits, or a missing SPF record on a domain that sends commercial mail.
Questions, answered.
Look up the TXT record on your root domain. A valid record starts with v=spf1 and lists authorized mechanisms. Run the checker above to validate syntax and lookup count.
Fix it once.Watch it forever.
CloudJet re-checks every record on every sending domain daily and fixes drift before it costs you the inbox.