Question 142 of 507
LPIC-2 DNS, Web and Mail Services Practice Question
Which Postfix configuration parameter specifies the domain that is appended to unqualified email addresses?
⚠ Common exam trap
A common mix-up: candidates confuse `myorigin` with `mydomain` or `myhostname`, assuming the domain appended comes from the server's hostname rather than the explicit parameter designed for address qualification.
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
✓
myorigin
The `myorigin` parameter in Postfix controls the domain that is appended to locally-originated mail from unqualified addresses (e.g., 'user' becomes 'user@example.com'). By default, it uses the value of `myhostname`, but it is commonly set to `$mydomain` to append the domain rather than the full hostname. This ensures that outbound mail has a consistent and clean sender 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.
- ✗
myhostname
Why it's wrong here
myhostname sets the server's hostname, not the domain for appending.
- ✓
myorigin
Why this is correct
myorigin specifies the domain to append to unqualified addresses.
- ✗
mydomain
Why it's wrong here
mydomain sets the local domain but does not automatically append it to unqualified addresses.
- ✗
mydomainname
Why it's wrong here
mydomainname is not a valid Postfix parameter.
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Last reviewed: Jun 25, 2026
This LPIC-2 practice question is part of Courseiva's free LPI 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 LPIC-2 exam.
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