How to fix a missing SPF record

What a missing SPF record means

SPF is a public DNS policy that identifies which mail systems may send mail for a domain. Without a record, receivers have no SPF policy from that domain to evaluate.

A missing SPF record does not identify every deliverability problem by itself. It is one email-authentication signal and should be reviewed with DKIM and DMARC.

Start with the sender inventory

Before creating an SPF record, list every service that sends mail using the domain. Typical sources include a business mailbox provider, a website form, an invoicing system, a support platform, marketing software, and application notifications.

Ask the owner of each sender for its documented SPF requirement. Do not guess by copying a record from a different domain or by adding broad mechanisms that you cannot explain.

Publish one record, not several

SPF allows one policy record for a domain. Multiple SPF records make evaluation invalid, so combine approved senders into a single policy using the instructions provided by those senders.

Choose the terminal policy only after the sender list is complete. A restrictive policy can be appropriate, but it can also affect legitimate mail if the inventory is incomplete.

1. Check whether an SPF record is missing or whether multiple records already exist.
2. Document every legitimate sending system.
3. Use each provider's official SPF instructions to build one policy.
4. Publish one TXT record at the sending domain.
5. Recheck the public policy and investigate delivery issues before tightening it further.

What this public check does not do

The CloudSpex SPF checker reports whether an SPF record is present, whether multiple records are published, and the terminal qualifier when it can be determined.

It does not resolve every include or redirect target or calculate the full SPF DNS-lookup limit. Use provider documentation and a controlled change process for the complete policy.