SPF records help receiving mail servers decide whether a sender is allowed to send email on behalf of a domain. They are a core part of email authentication and sender policy control.
SPF defines which mail servers and services are allowed to send email for your domain. It helps reduce spoofing and improves trust in your email setup.
SPF lookups are useful when setting up business email, connecting newsletter tools, adding transactional mail services, or troubleshooting failed authentication.
Look for a TXT record beginning with v=spf1. Check whether it includes all the services you actually use for sending email.
Common problems include missing senders, multiple SPF records, syntax mistakes, and outdated services left in the policy.
Once you understand what to look for, run a live check using the tool below.
Launch DNS LookupSPF is an email authentication method that tells receiving servers which senders are authorized for your domain.
SPF helps, but it works best together with DKIM and DMARC.
This page explains the purpose of the check, what results mean, and what problems to watch for before you run the live tool.
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