Select the proper order to illustrate the proper flow for how email is sent and
ID: 3588523 • Letter: S
Question
Select the proper order to illustrate the proper flow for how email is sent and received.
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
Recipient retrieves email from email server
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
SMTP server is contacted
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
Email is placed in receiving user’s inbox
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
DNS server locates an MX record
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
SMTP server sends email to receiving MTA server
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
SMTP server receives IP address of receiving email server
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
MX record reveals IP address of receiving email server
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
Email is composed in a mail client
- 1. 2. 3. 4. 5. 6. 7. 8. 9.
SMTP server contacts a DNS server on the Internet
Explanation / Answer
Answer:
Explanation:
To send Internet e-mail, requires an Internet connection and access to a mail server. The standard protocol used for sending Internet e-mail is called SMTP (Simple Mail Transfer Protocol). The SMTP protocol is used to both send and receive email messages over the Internet.
When a message is sent, the email client sends the message to the SMTP server. If the recipient of the email is local (i.e. at the same domain as the email originated from) the message is kept on the server for accessing by the POP, IMAP or other mail services for later retrieval.
If the recipient is remote (i.e. at another domain), the SMTP server communicates with a Domain Name Server (DNS) to find the corresponding IP address for the domain being sent to. Once the IP address has been resolved, the SMTP server connects with the remote SMTP server and the mail is delivered to this server for handling.
If the SMTP server sending the mail is unable to connect with the remote SMTP server, then the message goes into a queue. Messages in this queue will be retried periodically. If the message is still undelivered after a certain amount of time (30 hours by default), the message will be returned to the sender as undelivered.
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