Introduction to Electronic Mail (Email): Safe Digital Letters
In the old days, if you wanted to send a message to a cousin living in Kaduna or an aunt in London, you had to write your letter by hand with pen and paper, fold it into a paper envelope, buy a postage stamp at the post office, and wait two or three weeks for a mail van or airplane to deliver it!
Today, we use Electronic Mail, or Email for short. An email message can travel across the world and land in someone's digital inbox in less than five seconds! In this lesson, we will learn how email works, dissect email addresses, and practice safe digital correspondence.
Learning Outcomes
By the end of this lesson, you will be able to:
- Explain what email is and compare its speed and convenience to postal letters.
- Deconstruct an email address into its two main parts separated by the
@symbol. - Identify the essential fields:
To,Subject,Body, andAttachment. - Practice email safety: Identifying spam and avoiding dangerous attachments.
Key Vocabulary
| Term | Everyday Meaning |
|---|---|
| Electronic Mail: digital messages transmitted over computer networks. | |
| Inbox | The digital folder where incoming messages are received and stored. |
| Subject Line | A short headline explaining the purpose of the email. |
| Attachment | A separate file (such as a photo, document, or audio clip) sent along with an email message. |
| Spam | Unwanted, unsolicited digital junk mail or advertising sent to many people. |
Study Notes: How Email Works
[ Sender: emeka@school.edu.ng ]
|
(Clicks "Send")
v
[ Outgoing Mail Server ]
|
(Internet WAN)
v
[ Incoming Mail Server ]
|
v
[ Receiver's Inbox: teacher@school.edu.ng ]
1. Anatomy of an Email Address
Every email address has a very specific format with two main parts:
$$\mathbf{tunde.bello}\mathbf{@}\mathbf{kinspire.org.ng}$$
- Username (
tunde.bello): The specific mailbox name assigned to the individual student or teacher. - The "At" Sign (
@): A unique connector symbol that separates the person from the place. - Domain Name (
kinspire.org.ng): The name of the organization or email provider running the mail server.
Notice that email addresses never contain spaces! Spaces are not permitted in electronic addresses.
2. The Email Composition Window
When you click "Compose" or "New Message" in an email program, you see four main fields:
+-------------------------------------------------------------------------+
| New Message [ - X]|
+-------------------------------------------------------------------------+
| To: headteacher@greenvalley.sch.ng |
| Subject: Primary 5 Science Exhibition Proposal |
+-------------------------------------------------------------------------+
| Dear Mrs. Okoro, |
| |
| Our Primary 5 class has designed a model of a solar water filter. |
| We would like to present our project at the school assembly on Friday. |
| |
| Respectfully yours, |
| Primary 5 Science Club |
| |
| [ Paperclip Icon: Solar_Filter_Diagram.pdf (240 KB) ] |
+-------------------------------------------------------------------------+
| [ Send Button ] |
+-------------------------------------------------------------------------+
ToField: Where you type the exact email address of the person you want to receive the message.SubjectLine: A brief title summarizing the email (e.g., "Inter-School Debate Invitation").- Message Body: The main area where you write your polite, well-formatted letter.
- Attachment (Paperclip Icon): Used to attach school homework files, pictures, or spreadsheets.
Worked Example: Polite Email Etiquette
Poor Email:
To: mr.danjuma@school.ng
Subject: (Left Blank)
Body: give me the homework now i lost it
Polite Educational Email:
To: mr.danjuma@school.ng
Subject: Request for Week 7 Mathematics Worksheet - Chidi Okon
Body:
Dear Mr. Danjuma,
Good afternoon, sir. I misplaced my printed mathematics worksheet during break today. Could you please send me an electronic copy so I can complete my homework tonight?
Thank you very much, sir.
Chidi Okon (Primary 5)
Notice the difference! The second email has a clear subject line, a respectful greeting, an explanation, and the student's name and class.
Practical Class Activity: Drafting a Paper Email
Take a clean page in your notebook and draw a rectangular email composition window. Fill in the following fields:
- To: Write your teacher's school email address (or an invented address like
teacher.amina@kinspire.org.ng). - Subject: Write a 4-word title about a school project you enjoyed this term.
- Body: Write a three-sentence polite note thanking your teacher for an exciting lesson.
- Signature: Sign off politely with your full name.
Common Mistakes & Corrections
| Common Mistake | Why It Is Incorrect | Proper Correction |
|---|---|---|
| "Leaving the Subject line blank is completely fine." | Blank subject emails look like junk mail and are often filtered into the spam folder. | Always provide a short, descriptive subject line for every email. |
| "Typing an email address with a space: 'fatima 2026@gmail.com'." | Email protocols cannot process spaces in addresses. | Remove all spaces: fatima2026@gmail.com. |
Notebook Summary
Copy Into Your Computing Notebook
- Email (Electronic Mail) allows users to exchange digital letters, documents, and pictures across networks.
- An email address has two parts separated by the
@symbol:username@domain. - Essential fields: To (recipient), Subject (headline), Body (message text), and Attachment (files).
- Never open attachments from unknown senders to protect your computer from viruses.