1) Which of the following is the correct syntax for postfix’s main configuration file?
a) /etc/postfix/mainconfig.cf
b) /etc/postfix/main.cf
c) /etc/postfix/config.cf
d) /etc/config/postfix.cf
Answer: b) /etc/postfix/main.cf
2) Which of the following applications is responsible for delivering mail in postfix?
a) smtpd
b) postfixd
c) maild
d) sendmail
Answer: a) smtpd
3) Which of the following commands can be used to restart postfix without stopping mail delivery?
a) postfix reload
b) postfix stop
c) postfix start
d) postfix restart
Answer: a) postfix reload
4) Which of the following protocols does postfix support for incoming mail delivery?
a) SMTP
b) POP3
c) IMAP
d) All of the above
Answer: a) SMTP
5) Which of the following tools can be used to view the mail queue in postfix?
a) mailq
b) postqueue
c) both a and b
d) neither a nor b
Answer: c) both a and b
6) Which of the following commands can be used to send a test email in postfix?
a) mail test@test.com
b) echo “test message” | mail -s “test subject” test@test.com
c) posttest -s “test subject” -r test@test.com
d) sendmail test@test.com -s “test subject” -m “test message”
Answer: b) echo “test message” | mail -s “test subject” test@test.com
7) Which of the following configuration options can be used to specify the default mail transport agent in postfix?
a) default_mta
b) default_mailer
c) default_transport
d) default_agent
Answer: c) default_transport
8) Which of the following commands can be used to view the postfix configuration parameters?
a) postconfig
b) postconf
c) postfixconf
d) confpost
Answer: b) postconf
9) Which of the following configuration options can be used to specify the local delivery agent in postfix?
a) local_transport
b) local_mailer
c) local_mta
d) local_agent
Answer: a) local_transport
10) Which of the following configuration options can be used to specify the internet hostname of the postfix server?
a) myhostname
b) hostname
c) servername
d) mailname
Answer: a) myhostname
11) Which of the following configuration options can be used to specify the internet domain name of the postfix server?
a) mydomain
b) domainname
c) serverdomain
d) maildomain
Answer: a) mydomain
12) Which of the following configuration options can be used to specify the maximum number of messages allowed in the mail queue in postfix?
a) max_messages
b) max_queue_size
c) max_mail_q
d) maximal_queue_size
Answer: b) max_queue_size
13) Which of the following configuration options can be used to specify the maximum number of messages sent per minute by one client in postfix?
a) max_messages_per_minute
b) max_client_message_rate
c) max_rate_per_client
d) maximal_client_message_rate
Answer: b) max_client_message_rate
14) Which of the following configuration options can be used to specify the maximum size of a single message that can be delivered by postfix?
a) max_message_size
b) max_mail_size
c) maximal_message_size
d) maximal_mail_size
Answer: c) maximal_message_size
15) Which of the following configuration options can be used to specify the SMTP greeting message in postfix?
a) smtp_greeting_message
b) smtpd_banner
c) smtp_banner
d) smtpd_greeting_message
Answer: b) smtpd_banner
16) Which of the following configuration options can be used to reject messages from certain domains in postfix?
a) reject_domains
b) blacklist_domains
c) deny_domains
d) smtpd_sender_restrictions
Answer: d) smtpd_sender_restrictions
17) Which of the following configuration options can be used to reject messages from certain IP addresses in postfix?
a) smtpd_recipient_restrictions
b) smtpd_client_restrictions
c) deny_ip
d) reject_ip
Answer: b) smtpd_client_restrictions
18) Which of the following configuration options can be used to reject messages with empty sender addresses in postfix?
a) smtpd_null_sender_restrictions
b) empty_sender_restrictions
c) reject_empty_senders
d) reject_null_senders
Answer: d) reject_null_senders
19) Which of the following configuration options can be used to specify the hostname of the relay server in postfix?
a) relay_hostname
b) relay_servername
c) relay_host
d) relay_server
Answer: c) relay_host
20) Which of the following configuration options can be used to enable TLS encryption in postfix?
a) enable_tls
b) tls_enabled
c) smtpd_tls_enable
d) tls_smtpd
Answer: c) smtpd_tls_enable
21) Which of the following configuration options can be used to specify the SSL certificate file in postfix for server authentication?
a) smtpd_tls_cert_file
b) smtpd_ssl_cert_file
c) tls_cert_file
d) ssl_cert_file
Answer: a) smtpd_tls_cert_file
22) Which of the following configuration options can be used to specify the SSL private key file in postfix for server authentication?
a) smtpd_tls_key_file
b) smtpd_ssl_key_file
c) tls_key_file
d) ssl_key_file
Answer: a) smtpd_tls_key_file
23) Which of the following configuration options can be used to specify the SSL certificate file in postfix for client authentication?
a) smtpd_tls_CAfile
b) smtpd_ssl_CAfile
c) tls_CAfile
d) ssl_CAfile
Answer: a) smtpd_tls_CAfile
24) Which of the following configuration options can be used to specify the SSL protocols supported by postfix?
a) tls_protocols
b) smtpd_tls_protocols
c) ssl_protocols
d) postfix_tls_protocols
Answer: b) smtpd_tls_protocols
25) Which of the following configuration options can be used to specify the SSL ciphers used by postfix?
a) smtpd_tls_ciphers
b) smtpd_ssl_ciphers
c) tls_ciphers
d) ssl_ciphers
Answer: a) smtpd_tls_ciphers
26) Which of the following configuration options can be used to block all outbound SMTP traffic except for authorized senders in postfix?
a) smtpd_sender_restrictions
b) smtpd_recipient_restrictions
c) smtpd_client_restrictions
d) smtpd_relay_restrictions
Answer: d) smtpd_relay_restrictions
27) Which of the following configuration options can be used to specify the email address for bounces in postfix?
a) bounce_address
b) postmaster_address
c) error_address
d) return_address
Answer: b) postmaster_address
28) Which of the following configuration options can be used to specify the timeout for message delivery in postfix?
a) timeout
b) delivery_timeout
c) message_delivery_timeout
d) smtp_timeout
Answer: d) smtp_timeout
29) Which of the following configuration options can be used to specify the maximum size of a single email attachment in postfix?
a) message_size_limit
b) mail_size_limit
c) attachment_size_limit
d) maximal_attachment_size
Answer: b) mail_size_limit
30) Which of the following configuration options can be used to reject messages from blacklisted senders in postfix?
a) smtpd_helo_restrictions
b) smtpd_sender_restrictions
c) smtpd_recipient_restrictions
d) smtpd_client_restrictions
Answer: b) smtpd_sender_restrictions
31) Which of the following configuration options can be used to specify the maximum number of simultaneous connections to the postfix server?
a) max_connections
b) smtpd_client_connection_limit
c) connection_limit
d) maximal_client_connections
Answer: b) smtpd_client_connection_limit
32) Which of the following configuration options can be used to specify the maximum number of messages sent per second by one client in postfix?
a) max_messages_per_second
b) max_client_message_rate
c) max_rate_per_client
d) maximal_client_message_rate
Answer: a) max_messages_per_second
33) Which of the following configuration options can be used to specify the maximum number of connections from one IP address in postfix?
a) max_connections_per_ip
b) smtpd_client_connection_count_limit
c) connection_count_limit
d) maximal_client_connections_per_ip
Answer: b) smtpd_client_connection_count_limit
34) Which of the following configuration options can be used to specify the maximum number of recipients per message in postfix?
a) recipient_limit
b) max_recipients
c) mail_recipient_limit
d) maximal_recipient_count
Answer: c) mail_recipient_limit
35) Which of the following configuration options can be used to specify the transport map for postfix?
a) transport_map
b) smtp_transport_map
c) mail_transport_map
d) postfix_transport_map
Answer: c) mail_transport_map
36) Which of the following configuration options can be used to specify the relay map for postfix?
a) relay_map
b) smtp_relay_map
c) mail_relay_map
d) postfix_relay_map
Answer: b) smtp_relay_map
37) Which of the following configuration options can be used to specify the delivery map for postfix?
a) delivery_map
b) smtp_delivery_map
c) mail_delivery_map
d) postfix_delivery_map
Answer: c) mail_delivery_map
38) Which of the following configuration options can be used to specify the destination for undeliverable mail in postfix?
a) bounce_destination
b) postmaster_destination
c) error_destination
d) undeliverable_destination
Answer: b) postmaster_destination
39) Which of the following configuration options can be used to specify the relay host authorization map for postfix?
a) relayhost_auth_map
b) smtp_sasl_auth_cache_name
c) relayhost_sasl_auth_cache_name
d) smtp_sasl_password_maps
Answer: d) smtp_sasl_password_maps
40) Which of the following configuration options can be used to specify the SASL authentication method for postfix?
a) smtpd_sasl_auth_enable
b) smtp_sasl_auth_enable
c) sasl_auth_enable
d) postfix_sasl_auth_enable
Answer: b) smtp_sasl_auth_enable
41) Which of the following configuration options can be used to specify the SASL security options for postfix?
a) smtp_sasl_security_options
b) smtpd_sasl_security_options
c) sasl_security_options
d) postfix_sasl_security_options
Answer: b) smtpd_sasl_security_options
42) Which of the following commands can be used to test the SASL authentication mechanism in postfix?
a) sasltest
b) authtest
c) smtpauth
d) testsaslauthd
Answer: d) testsaslauthd
43) Which of the following configuration options can be used to specify the SASL realm for postfix?
a) smtp_sasl_realm
b) smtpd_sasl_realm
c) sasl_realm
d) postfix_sasl_realm
Answer: b) smtpd_sasl_realm
44) Which of the following configuration options can be used to specify the SASL mechanism for postfix?
a) smtp_sasl_mechanism
b) smtpd_sasl_mechanism
c) sasl_mechanism
d) postfix_sasl_mechanism
Answer: b) smtpd_sasl_mechanism
45) Which of the following configuration options can be used to specify the SASL settings for TLS in postfix?
a) smtp_sasl_tls_security_options
b) smtpd_sasl_tls_security_options
c) sasl_tls_security_options
d) postfix_sasl_tls_security_options
Answer: b) smtpd_sasl_tls_security_options
46) Which of the following configuration options can be used to specify the SASL settings for CRAM-MD5 in postfix?
a) smtp_sasl_cram_md5_enable
b) smtpd_sasl_cram_md5_enable
c) sasl_cram_md5_enable
d) postfix_sasl_cram_md5_enable
Answer: b) smtpd_sasl_cram_md5_enable
47) Which of the following configuration options can be used to specify the SASL settings for DIGEST-MD5 in postfix?
a) smtp_sasl_digest_md5_enable
b) smtpd_sasl_digest_md5_enable
c) sasl_digest_md5_enable
d) postfix_sasl_digest_md5_enable
Answer: b) smtpd_sasl_digest_md5_enable
48) Which of the following configuration options can be used to specify the SASL settings for LOGIN in postfix?
a) smtp_sasl_login_enable
b) smtpd_sasl_login_enable
c) sasl_login_enable
d) postfix_sasl_login_enable
Answer: b) smtpd_sasl_login_enable
49) Which of the following configuration options can be used to specify the SASL settings for PLAIN in postfix?
a) smtp_sasl_plain_enable
b) smtpd_sasl_plain_enable
c) sasl_plain_enable
d) postfix_sasl_plain_enable
Answer: b) smtpd_sasl_plain_enable
50) Which of the following configuration options can be used to specify the SASL authentication cache in postfix?
a) smtp_sasl_auth_cache_name
b) smtpd_sasl_auth_cache_name
c) sasl_auth_cache_name
d) postfix_sasl_auth_cache_name
Answer: b) smtpd_sasl_auth_cache_name
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