beginner / July 2026

Email Authentication Basics Quiz

Mailbox providers need signals that prove your sending domain is legitimate. Check SPF, DKIM, DMARC, alignment, DNS records, and common authentication mistakes before sender trust is at risk.

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Questions
10
Time limit
5 min
Scoring
First signed-in attempt counts
Edition
July 2026

What this quiz checks

Verify the sending domain before mail goes out

SPFDKIMDMARCSender guidelinesDomain authentication
  • Authentication proves sender identityEmail authentication helps receiving systems check whether a message is authorized by the sending domain. It is a core trust signal for modern email programs.
  • Sender requirements keep risingMailbox providers increasingly expect proper authentication, low spam rates, and easy unsubscribe handling, especially for bulk senders.
  • Check the setup before campaignsAuthentication problems can be caused by missing DNS records, misaligned domains, or sending from an unauthenticated platform.

Study first

Review the ideas behind the questions

These notes explain how SPF, DKIM, DMARC, alignment, and DNS records help mailbox providers verify a sender.

Authentication proves sender identity

Email authentication helps receiving systems check whether a message is authorized by the sending domain. It is a core trust signal for modern email programs.

  • SPF lists servers allowed to send for a domain.
  • DKIM signs messages so receivers can verify they were not changed.
  • DMARC tells receivers how to handle mail that fails checks.
  • Authentication does not replace consent or list quality.

Sender requirements keep rising

Mailbox providers increasingly expect proper authentication, low spam rates, and easy unsubscribe handling, especially for bulk senders.

  • Use the sender guidelines for Gmail and Google Workspace recipients.
  • Keep spam complaint rates low.
  • Make unsubscribe easy for recipients.
  • Do not send from domains that are not properly configured.

Check the setup before campaigns

Authentication problems can be caused by missing DNS records, misaligned domains, or sending from an unauthenticated platform.

  • Verify domain records before relying on a sending platform.
  • Check whether SPF, DKIM, and DMARC are passing.
  • Use a consistent from-domain strategy.
  • Recheck authentication after changing email tools or domains.

Question quality

Reviewed before publishing

Reviewed by
Aniruddh Sharma
Last checked
August 22, 2026

Drafted from Gmail, Google Workspace, and Mailchimp documentation, with questions focused on beginner email authentication checks.

The source pages for this edition were checked as part of the same review. Official product docs are linked where available.

Reviewer profileHow questions are checked

Sources

Sources used for this quiz

These pages support the quiz content and study notes.

Keep going

See all email marketing quizzesPractice more email marketing and deliverability basics.Try the email deliverability quizReview spam rates, bounces, sender reputation, and list quality.Try the email list management quizBalance authentication checks with consent and list hygiene.