Quiz 3: SMTP

On the main mail server, which of the following was a purpose of the MTA service? A. Send email from users on gmail servers. B. Forward email from users on other servers in the LAN. C. Forward email to users on other servers in the LAN. D. Receive email for users on dmail servers.

B. Forward email from users on other servers in the LAN.

Mail Transport Agents have the ability to relay email messages from other systems. Which of the following are NOT appropriate systems to relay for? A. The mail server system itself B. Systems on the Wide Area Network C. Systems on the Local Area Network D. Systems required to authenticate SMTP users

B. Systems on the Wide Area Network

Email messages sent to [email protected] are delivered to bob's mail box on the host identified by mail.utahsg.net. mysql.utahsg.net and mail.utahsg.net are different computer systems with different IP addresses. How is this possible? A. An MX record for mysql.utahsg.net points to mail.utahsg.net B. The mail.utahsg.net MTA fetches all messages after it is delivered to mysql.utahsg.net C. The mysql.utahsg.net MTA forwards incoming messages to mail.utahsg.net D. There is a portal from mysql.utahsg.net mailboxes to mail.utahsg.net mailboxes.

A. An MX record for mysql.utahsg.net points to mail.utahsg.net

Which of the following best describes how a satellite smtp host functions? A. Can send but does not receive email B. Can send and receive email C. Can receive but cannot send email D. Cannot send or receive email

A. Can send but does not receive email

Which piece of server software is responsible for allowing the user to remotely manage folders of messages? A. MUA B. MTA C. Master D. MDA

A. MUA

As you test your email configuration, you send yourself a message. Upon opening the message, you see that the reply-to address is bob@foo rather than [email protected]. What do you need to fix? A. The /etc/hosts file B. The search-dns field on your host C. Your smarthost D. Your MX records on bind

A. The /etc/hosts file

Why should the imap2 port (143) be disabled on the IMAP server? A. The protocol is not encrypted. B. The protocol is no longer supported by IMAP client programs. C. It should be enabled, for proper functionality. D. Email viruses usually travel through port 143 (imap2).

A. The protocol is not encrypted.

Which piece of software is responsible for storing new messages into the user's mail box? A. MTA B. MUA C. MDA D. Master

C. MDA

Which piece of software is responsible for receiving incoming SMTP messages from the Internet? A. Master (DNS Master Authoritative Server) B. MUA (Mail User Agent) C. MTA (Mail Transport Agent) D. MDA (Mail Delivery Agent)

C. MTA (Mail Transport Agent)

During the semester, we installed the MTA service on our DNS servers. What was the function of the MTA on those servers? A. Receive email for users on the DNS server. B. Receive email regarding DNS issues. C. Send email from users on the DNS server. D. Send email to the DNS hierarchy with DNS updates.

C. Send email from users on the DNS server.

Email messages sent from [email protected] (located on the DSU campus) to users at gmail.com are successfully delivered. This is somewhat surprising, since the DSU campus firewall does not allow any of the IP addresses available to utahsg.net to send outgoing email messages. How do the messages get out of the firewall? A. The utahsg.net MTA uses the google API to deliver messages to gmail B. The utahsg.net MTA uses web port to send messages to gmail C. The utahsg.net MTA uses a smarthost, which is allowed to send out D. The utahsg.net MTA uses an SSH tunnel to send messages to gmail

C. The utahsg.net MTA uses a smarthost, which is allowed to send out

What did we use SASL for? A. To enable SSL on our website B. To securely retrieve mail using IMAP C. To secure the channel between the MUA and MTA D. To encrypt our DNS queries

C. To secure the channel between the MUA and MTA

When will exim's paniclog have something in it? A. when mail is received for a host that exim is not configured to receive for B. When mail is received for a user that doesn't exist C. When you misconfigure exim D. every time you restart exim

C. When you misconfigure exim

Mail Transport Agents use DNS to translate the host name part of an email address into an IP address. Which DNS records are used by the MTA? A. MX only B. A only C. A if available D. MX if available. if not, then A

D. MX if available. if not, then A

Information about all messages sent or received by exim can be found in the _____. A. rejectlog B. errorlog C. paniclog D. mainlog

D. mainlog