An administrator is testing SMTP authentication on a Postfix server. They connect to the server on port 587 and issue the EHLO command. The server responds with a list of extensions, but AUTH is not listed. What is the most likely reason?

The server is using a different port for SMTP authentication.

The client must issue the STARTTLS command before AUTH is advertised.

The server is not configured to offer SASL authentication on port 587.

The server requires the client to authenticate before EHLO.

A company runs a mail server that supports both POP3 and IMAP. A user wants to access their email from a desktop client and a mobile device, and they want to see the same folders and read/unread status on both. However, they also want to keep a local archive of all messages on their desktop. Which configuration should the administrator recommend?

Use IMAP on both clients and enable the desktop client's 'keep a copy of messages on the server' option.

Use IMAP on the desktop and POP3 on the mobile device.

Use POP3 on both clients and configure the mobile device to leave messages on the server.

Use POP3 on the desktop client and IMAP on the mobile device.

A user reports that they can send email but cannot receive email from external senders. The administrator checks the mail logs and sees the following entry: 'NOQUEUE: reject: RCPT from mail.external.com[203.0.113.10]: 550 5.1.1 User unknown'. What is the most likely cause?

The server's TLS certificate is invalid.

The recipient address is not valid on the server.

The sender's IP address is blocked.

A Postfix server is configured to relay mail for a specific network. The administrator wants to ensure that only clients from the 192.168.1.0/24 network can relay mail through the server. Which setting in main.cf should be configured?

smtpd_recipient_restrictions = permit_mynetworks, reject

LPI LPIC-2:Linux Engineer (201-450)

Domain 12Objective 1

211.1 Using E-Mail Servers (weight: 4) LPIC-2 Practice Questions (Page 1)

Part of the Topic 211: E-Mail Services domain, which makes up ~5% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~2–3 in this domain), expect 1–2 from this objective — we provide 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

8concepts

Questions 1–5

1foundation · easy
Which protocol is used to encrypt SMTP connections between a mail client and a mail server?
Select an answer first
2application · medium
An administrator is testing SMTP authentication on a Postfix server. They connect to the server on port 587 and issue the EHLO command. The server responds with a list of extensions, but AUTH is not listed. What is the most likely reason?
Select an answer first
3expert · medium
A company runs a mail server that supports both POP3 and IMAP. A user wants to access their email from a desktop client and a mobile device, and they want to see the same folders and read/unread status on both. However, they also want to keep a local archive of all messages on their desktop. Which configuration should the administrator recommend?
Select an answer first
4application · medium
A user reports that they can send email but cannot receive email from external senders. The administrator checks the mail logs and sees the following entry: 'NOQUEUE: reject: RCPT from mail.external.com[203.0.113.10]: 550 5.1.1 User unknown'. What is the most likely cause?
Select an answer first
5application · medium
A Postfix server is configured to relay mail for a specific network. The administrator wants to ensure that only clients from the 192.168.1.0/24 network can relay mail through the server. Which setting in main.cf should be configured?
Select an answer first

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211.1 Using E-Mail Servers (weight: 4) LPIC-2 Practice Questions (Page 1)

Questions 1–5

Which protocol is used to encrypt SMTP connections between a mail client and a mail server?

An administrator is testing SMTP authentication on a Postfix server. They connect to the server on port 587 and issue the EHLO command. The server responds with a list of extensions, but AUTH is not listed. What is the most likely reason?

A user reports that they can send email but cannot receive email from external senders. The administrator checks the mail logs and sees the following entry: 'NOQUEUE: reject: RCPT from mail.external.com[203.0.113.10]: 550 5.1.1 User unknown'. What is the most likely cause?

A Postfix server is configured to relay mail for a specific network. The administrator wants to ensure that only clients from the 192.168.1.0/24 network can relay mail through the server. Which setting in main.cf should be configured?

Keep studying — Topic 211: E-Mail Services