Network Servers and Services Lesson 003: Email Servers

Email Servers

Servers that are set up to compose a message and send it to another user.

What does SMTP stand for?

Simple Mail Transfer Protocol.

What does POP3 stand for?

Post Office Protocol 3

What are the four main types of email servers?

SMTP, POP3, IMAP, and Microsoft Exchange.

Simple Mail Transfer Protocol

Specifies how emails should be delivered from one mail domain to another.

How does SMTP know which server to send an email to?

By using the domain name, which is what is after the @ symbol.

If necessary, what will SMTP do after reaching an email server?

Will send the email to another email server.

What is the only thing that SMTP does?

Send emails.

What port/s does SMTP utilize?

Port 25.

Which email protocol is considered legacy?

POP3.

Post Office Protocol 3

Allows a user to connect to an email server, download messages, and process them on a local machine.

What port/s does POP3 operate on?

Port 110.

What happens when someone accesses their email utilizing the POP3 protocol?

The client connects to the email server, downloads the messages, and then deletes them from the server.

What was the huge limitation with utilizing the POP3 email protocol?

Emails can get scattered across multiple devices, due to POP3 functions.

Internet Message Access Protocol

A mail retrieval protocol designed to do mailbox management.

What does IMAP do in function?

Gives the ability to read emails, copy them to the user’s machine, and keep a copy of the emails on the email server.

What is an additional functionality that IMAP possesses?

The ability to sync the read status of emails across devices.

What port/s does the IMAP protocol utilize?

Port 143.

Microsoft Exchange

Mailbox server environment designed for Windows-based domain environments.

What protocols does Microsoft Exchange use?

POP3, IMAP, and SMTP.

Why is Microsoft Exchange mentioned at all in CompTIA A+

Because it is commonly utilized in corporate environments.