NSE7 Advanced Threat Protection Practice Question
An organization wants to implement email authentication to prevent spoofing and phishing attacks. They use FortiMail as their email security gateway. Which THREE mechanisms should they configure to achieve comprehensive email authentication?
⚠ Common exam trap
It's easy for candidates to confuse encryption (TLS) or antispam filtering with authentication mechanisms, failing to recognize that SPF, DKIM, and DMARC are the three complementary protocols specifically designed for email authentication and spoofing prevention as defined in RFC 7208, RFC 6376, and RFC 7489.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Sender Policy Framework (SPF)
Sender Policy Framework (SPF) is correct because it allows the domain owner to publish a DNS TXT record listing authorized sending IP addresses, enabling receiving mail servers (like FortiMail) to verify that the email originated from an approved source. This directly prevents spoofing by rejecting messages from unauthorized IPs claiming to be from the domain.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Transport Layer Security (TLS) for SMTP
Why it's wrong here
TLS encrypts the connection but does not authenticate the sender domain.
- ✗
FortiGuard Antispam
Why it's wrong here
Antispam is a filtering technique, not an authentication mechanism.
- ✓
Sender Policy Framework (SPF)
Why this is correct
SPF verifies that the sending server is authorized by the domain owner.
- ✓
Domain-based Message Authentication, Reporting and Conformance (DMARC)
Why this is correct
DMARC uses SPF and DKIM to define policy for unauthenticated emails.
- ✓
DomainKeys Identified Mail (DKIM)
Why this is correct
DKIM adds a digital signature to emails to verify integrity and sender.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This NSE7 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE7 exam.