GWS-ADMIN Troubleshooting Practice Question
A user reports that emails are not being sent to an external mailing list. The logs show '550 5.1.1'. What does this code indicate?
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
✓
The recipient address is invalid.
A 550 5.1.1 error code indicates that the recipient address does not exist or is invalid.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The sender is blocked.
Why it's wrong here
A sender block would typically result in a 550 5.7.1 error.
- ✗
The message was marked as spam.
Why it's wrong here
Spam rejections have different codes.
- ✗
The server is temporarily down.
Why it's wrong here
Temporary server issues are usually 4xx codes.
- ✓
The recipient address is invalid.
Why this is correct
5.1.1 specifically means the mailbox is unavailable or does not exist.
About these practice questions
One of 208 original GWS-ADMIN practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 Google Cloud exam blueprint
This GWS-ADMIN practice question is part of Courseiva's free Google Cloud 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 GWS-ADMIN exam.