This document discusses HTML and email. It explains that HTML is used not only to create websites, but also to send and receive email. It shows how to view the HTML code of an email message. It then describes how email works, with messages being sent from the sender's email server to the recipient's server, similarly to how web pages are requested from websites. Finally, it notes that while websites and emails look nice, they are both created using HTML code under the surface.

1. Unit 1: Web Fundamentals
Lesson 3: HTML and Email
August 20, 2013

2. Lesson 3: HTML and Email
2
Introduction
to HTML
Learning to
Use HTML
HTML and
Email
History and
Future of the
Web
HTML and
Forms
Search
Engine
Optimization
Learning to
Use CSS
Introduction
to CSS
Reusing
Code
3 Ways to
Use CSS
Separation of
Concerns
Launching
Your Own
Website
Lesson 1 Lesson 2 Lesson 3 Lesson 4
Lesson 8 Lesson 7 Lesson 6 Lesson 5
Lesson 9 Lesson 10 Lesson 11 Lesson 12
Build understanding Develop skills

3. Recap from last time (I)
• It’s simple to create an HTML file – no different from creating a Word
document or a PDF file
• .html files are opened with web browsers, in the same way that .doc
files are opened with Microsoft Word and .pdf files are opened with
Adobe Reader
3
opens
.doc files
opens
.pdf files
opens
.html files

4. Recap from last time (II)
• A web browser is an application used to access and display web
pages and other content on the internet
• There are many different browsers, but they all have the same basic
function – to load HTML files
4
Chrome Internet
Explorer
Firefox Safari Opera

5. So far we have only seen HTML used in websites
• HTML is also used in every email you send or receive
• Just like a website such as the Guardian, an email may be stylized to
look nice, but it’s actually written in a bunch of HTML code
5
This is HTML!

6. How do we view the HTML of an email? (I)
1. Let’s see how to do this in Gmail. If you don’t have a Gmail
account, just follow along. Go to www.gmail.com, type in your
Username and Password, and sign in.
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Sign in here

7. How do we view the HTML of an email? (II)
2. In the main screen, select an email in your inbox and click it
7
Click on the email

8. How do we view the HTML of an email? (III)
3. Next to the reply button, click on the arrow to bring up a menu of
additional options. Click on ‘Show original’.
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First click here
Then click here

9. How do we view the HTML of an email? (IV)
4. A new page should open. Scroll all the way to the bottom and you
should see HTML!
9
This is HTML!

10. So how does email work? (I)
• We’ve seen how the internet works already. Email is actually pretty
similar. Let’s revisit our friend, Andy Murray.
10
Let’s email Roger
iamandy@gmail.com
federererer@yahoo.com

11. So how does email work? (II)
1. When Andy writes an email to Roger, his message is first sent to a
Gmail server (because he uses Gmail).
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iamandy@gmail.com
federererer@yahoo.com
Gmail
server

12. So how does email work? (III)
2. The Gmail server has to decide where to send Andy’s message.
Since Roger uses Yahoo! Mail, the Gmail server uses a Domain
Name Server, or DNS, to find the Yahoo server.
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iamandy@gmail.com
federererer@yahoo.com
Gmail
server
Hotmail
server
Yahoo
server
AOL
server
DNS

13. So how does email work? (IV)
3. Once the Yahoo server is found, the message is sent and Roger
can now read the email whenever he logs in to check his inbox!
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Thanks Andy!
iamandy@gmail.com
federererer@yahoo.com
Gmail
server
Hotmail
server
Yahoo
server
AOL
server
DNS

14. Email vs. Websites (I)
• Both rely on servers to
transmit information
• Both involve sending and
receiving HTML
• Both use DNS to find the
right servers to use
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How are they similar? How are they different?

15. Email vs. Websites (II)
• Both rely on servers to
transmit information
• Both involve sending and
receiving HTML
• Both use DNS to find the
right servers to use
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• Email messages are sent from
one server to another. Website
requests are sent from a user to
a single server and back
• Email is for messages written in
HTML. Websites are for
webpages written in HTML.
How are they similar? How are they different?

16. Summary (I)
• HTML is important – not only is it used to create websites, but it also
allows us to send email
• While both websites and email are made to look pretty on the
outside, they are actually created with some HTML code
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Website Email
HTML

17. Summary (II)
• The way email works is similar to the way websites load
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Thanks Andy!
iamandy@gmail.com
federererer@yahoo.com
Gmail
server
Hotmail
server
Yahoo
server
AOL
server
DNS

18. What to do on your own
1. Go to URL to complete the Codecademy course online
2. Do the practice set on the material learned
1. Take the follow-up quiz to test your understanding
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