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LFCS · Question #414
LFCS Question #414: Real Exam Question with Answer & Explanation
The correct answer is A: Consolidating the number of open lookup tables.. Proxymap in Postfix helps consolidate multiple open lookup tables into a single service and can be used to overcome chroot restrictions for lookup tables.
Submitted by hassan_iq· Apr 18, 2026Service Configuration
Question
What can proxymap be used for in a Postfix installation? (Select TWO correct answers)
Options
- AConsolidating the number of open lookup tables.
- BCreating and querying Postfix alias databases.
- CMapping mail user IDs to system accounts.
- DOvercoming chroot restrictions.
- ECreating and querying Postfix lookup tables.
Explanation
Proxymap in Postfix helps consolidate multiple open lookup tables into a single service and can be used to overcome chroot restrictions for lookup tables.
Common mistakes.
- B. While Postfix uses lookup tables for aliases, proxymap's primary purpose is not creating/querying alias databases specifically, but rather generic lookup table access.
- C. Mapping mail user IDs to system accounts is a function of virtual maps or other address rewriting mechanisms, not the primary use of proxymap itself.
- E. Proxymap does not create lookup tables; it provides a proxy service for querying existing Postfix lookup tables.
Concept tested. Postfix proxymap functionality
Reference. http://www.postfix.org/proxymap.8.html
Topics
#Postfix#Mail Server Configuration#Chroot#Lookup Tables
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