Remember SPF
Full name: Sender Policy Framework
Memory aid: Sender Permission is Found in DNS as a cue.
SPF does not directly authenticate the visible From header.
Study area: Protocols & logical ports · Batch 7
Relevant study for: CompTIA A+ Core 1 220-1201 · CompTIA Network+ N10-009 · CompTIA Security+ SY0-701 · Cisco CCNA 200-301 · ISC2 CISSP 2024 outline
Practice with exam flashcards →Networking & Connectivity / Knowledge library
SPF — Sender Policy Framework
Publishes which systems may send mail for a domain's envelope identity.
Why learn SPF — Sender Policy Framework?
Publishes which systems may send mail for a domain's envelope identity.
Where it came from
SPF does not directly authenticate the visible From header.
- Memory aid (a learning cue, not the expansion): Sender Permission is Found in DNS as a cue.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand SPF: Sender Policy Framework.
- Recall this memory aid: Sender Permission is Found in DNS as a cue.
- Explain the practical use: Publishes which systems may send mail for a domain's envelope identity.
- Explain this distinction: SPF does not directly authenticate the visible From header.
- Identify SPF in a device specification, architecture diagram, or system inventory.
Documentation and sources
- IETF RFC 7208 (www.rfc-editor.org)