Choose the set containing only common Linux mail transfer agents.
Which combination is appropriate?
Postfix, Sendmail, and Exim are well-known MTAs on Linux and Unix systems.
Detailed explanation
Incorrect. Dovecot is a mail-access service, CUPS is printing, and BIND is DNS.
Incorrect. Dovecot is a mail-access service, CUPS is printing, and BIND is DNS.
Correct. Postfix, Sendmail, and Exim are MTAs.
Correct. Postfix, Sendmail, and Exim are MTAs.
Incorrect. These are web server and proxy products.
Incorrect. These are web server and proxy products.
Incorrect. They provide SSH, time synchronization, and logging.
Incorrect. They provide SSH, time synchronization, and logging.
Try it yourself
An example you can run in a temporary verification environment.
printf '%s\n' postfix sendmail eximExpected result
postfix
sendmail
eximKey points
- Three are MTAs
- Dovecot is mail access
- Distinguish web and DNS services
Notes
- Environment: 名称一覧の表示のみ
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.