mediumMultiple ChoiceObjective-mapped
220-1201 Practice Question: That their email client cannot send messages but…
A user reports that their email client cannot send messages but can receive them. The technician verifies that the email server is reachable and that the user's credentials are correct. Which protocol is most likely misconfigured in the email client?
⚠ Common exam trap
The CompTIA A+ exam often tests the distinction between sending and receiving protocols, and the trap here is that candidates confuse POP3 or IMAP as being involved in sending emails, when they are strictly for retrieval.
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
✓
SMTP
SMTP (Simple Mail Transfer Protocol) is used for sending outgoing email messages from a client to a server or between mail servers. Since the user can receive emails but not send them, and the server is reachable with correct credentials, the most likely misconfiguration is in the SMTP settings (e.g., wrong port, missing authentication, or incorrect server address).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
SMTP
Why this is correct
SMTP (Simple Mail Transfer Protocol) is the standard protocol used by email clients to send outgoing email messages to an email server. If a user reports an inability to send email, it directly indicates a problem with the SMTP configuration, such as an incorrect server address, an invalid port (e.g., 25, 465 for SMTPS, or 587 for message submission), or failed authentication credentials. Proper SMTP setup is absolutely essential for successful outbound email delivery.
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POP3
Why it's wrong here
POP3 (Post Office Protocol version 3) is a protocol specifically designed for retrieving email messages from a mail server to a local client. It typically downloads messages to the local device and often deletes them from the server after retrieval. Since the user's reported issue is with *sending* email, and not *receiving* it, POP3 configuration is entirely unrelated to the problem at hand.
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IMAP
Why it's wrong here
IMAP (Internet Message Access Protocol) is another protocol used exclusively for retrieving and managing email messages on a mail server. Unlike POP3, IMAP allows users to access and synchronize email across multiple devices, leaving messages on the server for persistent access. As IMAP's function is solely for inbound mail management and retrieval, any misconfiguration would impact the ability to *receive* or view existing messages, not the ability to *send* new ones.
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HTTP
Why it's wrong here
HTTP (Hypertext Transfer Protocol) is the foundational protocol for data communication on the World Wide Web, primarily used for accessing websites and web-based applications. While webmail interfaces (like accessing Gmail or Outlook.com through a browser) utilize HTTP for their front-end, a dedicated email client relies on specific email protocols like SMTP for sending and POP3 or IMAP for receiving. Therefore, HTTP itself is not directly involved in the sending functionality of a standalone email client.
Go deeper
Related to this question
Learn chapter
Mobile Email Configuration: POP3, IMAP, Exchange
Key term
Simple Mail Transfer Protocol
Simple Mail Transfer Protocol (SMTP) is the standard internet protocol used for sending and relaying email messages from a client to a server or between servers.
Key term
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A CAN (Controller Area Network) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1201 practice question is part of Courseiva's free CompTIA 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 220-1201 exam.