FORTINET-NSE56 Nse6 Fortimail Secure Email Gateway Practice Question
Which DNS record must be published in the public DNS to enable DKIM signing for outgoing mail?
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
✓
TXT record containing the public key
DKIM uses a public key published in a DNS TXT record so that receiving servers can verify the signature added to the email header.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
TXT record containing the public key
Why this is correct
The public key is published as a DNS TXT record.
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PTR record
Why it's wrong here
PTR records are for reverse DNS lookups.
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A record
Why it's wrong here
A records map domain names to IP addresses.
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MX record
Why it's wrong here
MX records specify the mail server for the domain.
Visual reference
About these practice questions
This FORTINET-NSE56 question is part of Courseiva's 301-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Fortinet exam blueprint
This FORTINET-NSE56 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 FORTINET-NSE56 exam.