WEBVTT

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How does a receiving server check your email sender?

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SPF publishes which sending servers a domain authorises.

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Understand the sender list.
6 SPF basics.

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SPF lists authorised servers
Sender Policy Framework is an email authentication method.
Sending domain · Authorised servers · Receiving check

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The record lives in DNS
Your domain publishes an SPF policy using a TXT record.
Domain DNS · TXT record · Provider instructions

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Include each sending service
Business mail, forms and invoice tools may use different senders.
Business mailbox · Website messages · Invoice service

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Use your actual provider setup
A record copied from another business may omit your services.
Provider documentation · Current sender list · Correct domain

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Check real outgoing messages
Ask your provider to verify authentication on delivered test mail.
Mailbox test · Form-message test · Authentication result

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Keep the sender list current
SPF is one part of delivery; DKIM and DMARC have related roles.
New sender review · Remove unused senders · Related protections

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Your checklist
SPF lists authorised servers · The record lives in DNS · Include each sending service · Use your actual provider setup · Check real outgoing messages · Keep the sender list current

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Ask your provider to check every legitimate sender.
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