Web, domains and email
SPF
Abbreviation for Sender Policy Framework
In short and in plain language
SPF is a record in the domain name system.
It says which servers may send email for a domain.
Mailboxes that receive mail check it. This way, fake senders stand out.
A fitting record helps keep the emails of a business out of spam.
Definition
SPF is a record in the domain name system that states which servers may send email for a domain. Receiving mailboxes check it so that forged senders stand out. A suitable record helps keep a business's emails out of the spam folder.