SPF checker for sender authentication
SPF tells mailbox providers which servers are allowed to send for your domain. Broken SPF is one of the fastest ways to tank placement.
Checks
Auth diagnostics
Quickly validate DNS and authentication posture before ramping volume.
Checkers
7
Signals
Actionable
Coverage
DNS + policy
SPF
Interpretation, not just pass/fail
DKIM
Validate selectors + alignment
DMARC
Policy + enforcement clarity
Checker UI (CloudJet console)
The interactive checker runs in the CloudJet console. This page explains methodology and how to read results so your team can validate DNS and authentication with clear guidance.
In simple terms
Understand SPF alignment for your sending domains.
Why it matters
These checks reduce preventable failures and shorten debugging time when deliverability shifts.
How CloudJet handles it
Use the console tool flows when available, and pair results with CloudJet domain verification and monitoring workflows.
How to use this page
The interactive checker UI is rolling out in the console. Today, this page documents the check, expected inputs, and how operators interpret results—plus FAQs for common mistakes.
What SPF validates
SPF is a DNS TXT record listing authorized senders. Misconfigured includes, too many DNS lookups, and syntax errors cause hard failures.
Related pages
Continue exploring capabilities that connect to this topic.
Questions & answers
Short, direct answers about this capability.
No. SPF is one authentication pillar. DKIM and DMARC alignment matter too, along with list quality and engagement.
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